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Columbus Scholars

The Christopher Columbus Foundation awards fellowships to outstanding individuals designated as "Columbus Scholars." These individuals impact the lives of others through innovation, creativity and risk taking. Below is an alphabetical listing of the Foundation's Columbus Scholars.

Photo of Dr. Anthony Atala
Anthony Atala, M.D.
Dr. Anthony Atala, Associate Professor of Surgery at Children's Hospital and Harvard Medical School in Boston, MA, was awarded the 2000 $100,000 Christopher Columbus Foundation Award for his research to create new organs in the laboratory. The new organs would be created for a specific patient with the patient's own cells.

 



Photo of William Berger, J.D.
William Berger, J.D.
William Berger, J.D. - Team Leader, National Self-Defense Institute, Be 'S.A.F.E.R' Program, and Chief of Police, North Miami Beach , FL. Awarded the 2003 $2,500 Homeland Security Award in the Information Sharing field. The Be 'S.A.F.E.R.' program (acronym for Strategic Actions For Emergency Response) is a unique, proven, community-based training tool that humanizes clinical Disaster/Emergency preparedness information. Be 'S.A.F.E.R.' works primarily with local law enforcement agencies to promote community policies for disaster prevention through being vigilant, informed, and communicating with law enforcement, and training officers to facilitate classes for citizens based on the needs of the community.



Photo of Vickie Boutiette
Vickie Boutiette
Mrs. Vickie Boutiette, a Reading Recovery Teacher Leader/Classroom teacher at Westside Elementary School in West Fargo, ND, is the recipient of the 2005 $10,000 Freida J. Riley Teacher Award. After potentially career-ending radical cancer surgery in 1990, further reconstructive surgeries and enduring speech therapy to learn to talk without part of her jaw, Vickie returned to teaching in 1993 as a reading teacher with one-on-one or small groups of students where she fulfills her commitment to make a positive impact in her students' lives. With a desire to see improvement in elementary students' success in reading and writing and undaunted by her physical limitations, Vickie became a Reading Recovery Teacher/Leader. Vickie has instituted the Reading Recovery program, a one-on-one literacy education program for first grade students, not only in her school district but many other districts throughout North Dakota. As the only trained Teacher/Leader in her State, she provides training, support and professional development for elementary school teachers. Building on her successes with first graders, Vickie continues her literacy challenge by expanding her focus to include teaching the same techniques to teachers in other grades to foster success in reading and writing with their students.


Photo of Donna H. Branson
Donna H. Branson, Ph.D.
Donna H. Branson, Ph.D. – Director of the Institute of Protective Apparel Research and Technology and Regents Professor at Oklahoma State University was presented the 2006 $25,000 Homeland Security Award. The award was sponsored by the public-private partnership of the Christopher Columbus Fellowship Foundation, a Federal government agency, and presented by AgustaWestland North America, one of the world’s largest helicopter manufacturers. Dr. Branson co-led an industry-academic team of researchers from 2001-2004 to develop a prototype of portable cooling vests for first-responders to hazardous materials incidents. More recently, she headed up development of body armor systems to provide protection for soldiers' arms and legs against devastating injuries caused by shrapnel. The design challenge was to accommodate conflicting requirements including: providing ballistic protection for arms, legs and associated joints while maintaining full soldier mobility; and minimizing additional weight and heat stress, in a time-sensitive manner. More than 5,000 units of QuadGard®, an innovative limb armor system weighing 10 pounds, are now being used in Iraq.


Photo of Judith Brown
Judith Brown
In 1995 the Christopher Columbus Fellowship Foundation chose Judith Brown as the first Columbus Scholar. Ms. Brown was a teacher intern and SciTEC program coordinator at the Columbus Center, a new national center for marine biotechnology research and education located in Baltimore, Maryland. The Columbus Center offered educational programs focusing on the marine environment that encourages science as a career path for young people, particularly minorities and women. Previously, Ms. Brown was an educator and pioneer in hands-on biology and biotechnology education in Montgomery County, Maryland.

During 1995-96, Ms. Brown was on a joint sabbatical at the Columbus Center and the Woodrow Wilson National Fellowship Foundation in Princeton, NJ, where she prepared national teaching standards for science teachers.



Photo of Michael Cantor, Ph.D.
Michael Cantor, Ph.D.
Michael B. Cantor, Ph.D. - President, WayPoint Research, Inc., Atlanta , GA. Awarded the 2003 $2,500 Homeland Security Award in the Border/Transportation Security field. Dr. Cantor has developed WayPoint, a four-minute, non-verbal test which assesses a person's ability to operate a man/machine system such as driving, pipeline control, piloting aircraft, filling drug prescriptions, law enforcement and baggage handling, among others.



Photo of Chris Cherry
Chris Cherry
Chris Cherry – Distinguished Member of the Technical Staff, Sandia National Laboratories, Albuquerque, NM, was awarded the 2004 $5,000 Homeland Security Award, sponsored by Paul S. Polo, Sr., in the Emergency Response field. Currently, he is involved in the research and development of specialized explosive systems, explosive entry, shaped charge technology and advanced explosives ordnance disposal (EOD) disablement tools. Mr. Cherry has invented, designed and patented many EOD and Explosive tools, and has designed many advanced initiation and explosive breaching systems. Mr. Cherry provides advanced training for military personnel, as well as local, State and Federal bomb squads, and is the creator of Operation America.



Photo of James C. Cobey, M.D., Ph.D.
James C. Cobey, M.D., M.P.H.
Dr. James C. Cobey, Orthopaedic Surgeon, Washington Hospital Center, Washington, D.C., was a 2002 $50,000 Frank Annunzio Award recipient in the Arts/Humanities/Humanitarian field. Dr. Cobey has been a lifelong champion of humanitarian causes and has put his professional medical expertise in orthopaedics to good use by helping thousands of children, patients, landmine and war victims worldwide. His research has resulted in bringing unheralded attention to the issue of landmines and helped galvanize support for a ban, which eventually led to the creation of the International Campaign to Ban Landmines, a group responsible for the 40-nation Mine Ban treaty calling for the destruction of stockpiled mines.


Photo of Pam CourtneyPam Courtney
Pam Courtney, a full-time Physical Education (PE) teacher at Hubert H. Bancroft Elementary School in Sacramento, CA, was the recipient of the 2004 $10,000 Freida J. Riley Teacher Award. She teaches students from grades 1-6, including those in the Special Education program. Miss Courtney, a former Junior Olympic athlete, earned her teaching credential in 1984. That same year, while in training for the 1988 Olympics bicycling team, she was severely injured in an automobile accident, losing the use of her legs. After a difficult and challenging recovery, she persevered and became a PE teacher, in spite of being confined to a wheelchair. To teach, reach and meet the needs of students with diverse abilities, Pam has developed a PE curriculum that makes it easy and fun for the children to learn anatomy, physiology, dance routines, nutrition, good sportsmanship, positive character development, and leadership skills.



Photo of Richard Craig, Ph.D. Richard A. Craig, Ph.D.
Dr. Richard A. Craig, Staff Scientist at the Pacific Northwest Laboratory in Richland, WA, was awarded the 2001 $100,000 Christopher Columbus Foundation Award for the development of the Timed Neutron Detection (TND) of Land Mines. This device finds plastic and metal mines by locating the hydrogen atoms that make up the destructive war devices.


Photo of Richard Craig, Ph.D. Aaron Diaz
Aaron Diaz – Staff Scientist, Nondestructive Characterization and Measurement Sciences Group, Pacific Northwest National Laboratory, Richland, WA, was awarded the 2004 $5,000 Homeland Security Award in the Border/Transportation Security field. His award-winning research has focused on ultrasonic nondestructive examination measurements, imaging and analysis. This work has resulted in the development of the Acoustic Inspection Device, a state-of-the-art technology used by U.S. and international Customs Officers at ports-of-entry, IRS Fuel Compliance Officers and other law enforcement officials for counterterrorism and drug interdiction activities. Mr. Diaz is routinely sought out by his peers and colleagues to consult on the most difficult non-destructive evaluation problems. His expertise has led to significant national and international recognition.



Photo of Amy Dunaway-Haney Amy Dunaway-Haney

Mrs. Amy Dunaway-Haney, a Spanish teacher at Kettering Fairmont High School, Kettering, Ohio was the recipient of the 2002 $10,000 Freida J. Riley Teacher Award. Amy was diagnosed at 8 years old with Limb Girdle Muscular Dystrophy, a degenerative muscle disease. Confined to a wheelchair since her sophomore year in high school, Amy had to overcome the challenges of her disease and the discouragement of some professors to achieve her dream of becoming a teacher. Amy's desire is to broaden her students' perspectives and inspire them to appreciate and make the most of the opportunities they have. As a result, a number of former students have become teachers, occupational therapists, doctors and special education teachers.


Photo of Marek Elbaum, M.D. Marek Elbaum, M.D.
Dr. Marek Elbaum, President of Electro-Optical Sciences, Inc. in Irvington, NY, was awarded the 1998 $100,000 Christopher Columbus Foundation Award for the development of MelaFind™, an imaging system for the early detection of melanoma, one of the deadliest of skin cancers.


Photo of Dr. Anthony Fauci Anthony S. Fauci, M.D.
Dr. Anthony S. Fauci, Director, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, was awarded the 2001 $50,000 Frank Annunzio Award in the Humanitarian field. Since the 1970s, Dr. Fauci has pioneered the field of human immunoregulation by making a number of basic scientific observations that serve as the basis for current understanding of the regulation of the human immune response. Dr. Fauci has made seminal contributions to AIDS virus and HIV infection research. Additionally, Dr. Fauci is the current leading spokesman on the threat of anthrax and small pox in this country.


Photo of Robert Ferguson Robert A. Ferguson
Mr. Robert A. Ferguson, a teacher at Whitney Middle School, Tulsa, OK, was awarded the first $5,000 Freida J. Riley Teacher Award in May 2000. A recipient of a Purple Heart for injures sustained in Vietnam, Mr. Ferguson has braved trials that would have defeated lesser men. In addition to his injuries, he has battled and triumphed over Crohn's disease and diabetes to accomplish his goal of becoming a special education teacher for multi-handicapped students in grades 6-8.


Photo of Millard Fuller Millard Fuller
Mr. Millard Fuller, Founder and President of Habitat for Humanity International (HFHI), a worldwide Christian housing organization, was awarded the 2000 $100,000 Frank Annunzio Award in the Humanitarian field. HFHI volunteers have built homes together with more than 100,000 families in need in more than 1500 United States cities and 60 other countries.



Photo of Robert C. Gallo, M.D. Robert C. Gallo, M.D.
Dr. Robert C. Gallo is the Director of the Institute of Human Virology and Professor of Medicine, Microbiology and Immunology, School of Medicine, University of Maryland, Baltimore, MD. Dr. Gallo was awarded the 2000 $10,000 Frank Annunzio Award in the Science/Technology field for his universally recognized pioneering achievements in the field of human retrovirology.


Photo of Michael Graves Michael Graves
Mr. Michael Graves, Architect, President and Principal, Michael Graves & Associates in Princeton, NJ, was awarded the 2001 $50,000 Frank Annunzio Award in the Art/Humanities field. Mr. Graves is a leading contemporary architect and has helped influence the transformation of architecture from abstract modernism toward more contextual and traditional themes since the 1980s.



Photo of Victor Hackopian Victor Hakopian
Victor Hakopian, a Special Education Teacher at Jean Parker Elementary School in San Francisco, CA, was awarded the 2003 $10,000 Freida J. Riley Teacher Award. Being disabled at a young age with a rare eye disease which left him legally blind, Victor had to overcome prejudice from his peers and society as well as family cultural beliefs. However, he learned that his destiny was in his own hands and he continually worked toward his goals. Victor promotes and expects excellence from his students as he inspires his students to have the confidence to take risks, and to know his classroom is a safe haven where they can do so.



Photo of Victor Hackopian James C. Hughes
James C. Hughes, 11th grade teacher of United States History, Humanities 11 and Advanced Placement U.S. History at Farmingdale High School, Farmingdale, NY is the recipient of the 2006 $10,000 Freida J. Riley Teacher Award. Blind since the age of three from a hereditary form of glaucoma, Jim was fortunate to have a mentor during his formative years, his older brother, Joey, who also had the disease. Joey’s untimely death at the age of 23, when Jim was just 16, spurred a determination and drive in Jim to use the lessons Joey taught him--accept the challenges, keep fighting and never use his disability as an excuse. By living beyond his disability, Jim won the approval of his college student-teacher placement coordinator and completed his student teaching in a “regular” school environment. He subsequently was hired as a teacher in a public school. His love of history led to his choice of discipline; and his commitment to his students has broadened his impact on his school and community. Regardless of whether his students are ‘at risk’ or advanced placement, his goal of having an impact on young people has been more than realized. He gives his students hope for their future despite whatever challenges they might face, teaching that obstacles create opportunities for growth, perseverance and success. Jim’s special rapport with his students enables him to treat all students equally; he cannot judge them based on appearances. He makes his students so comfortable with his disability, that they sometimes forget that he is blind. They don’t see or treat Mr. Hughes differently because he is blind; they accept him for who he is.


Photo of Joany Jackman, Ph.D.Joany Jackman, Ph.D.
Dr. Joany Jackman, Senior Scientist, The Johns Hopkins University, Applied Physics Laboratory, Laurel, MD. was awarded the 2003 $2,500 Homeland Security Award in the Emergency Response field. Dr. Jackman is developing methods to analyze breath for novel markers of infection. This technology uses proteins and lipids secreted by the host in response to pathogens in the lungs to detect signs of infection prior to the appearance of symptoms. This technology will allow rapid triage of individuals at the scene of a potential bioterrorist attack. It will allow emergency medical personnel to focus their resources on the most seriously ill individuals and permit rapid and early treatment. This technology, once fully developed, will reduce the impact of bioterrorism, by improving the outcome and treatment of exposed populations.



Photo of Dr. Frances Ligler Frances S. Ligler, D.Phil., D.Sc.
Dr. Frances S. Ligler, USN Senior Scientist for Biosensors and Biomaterials, Naval Research Laboratory, Center for Bio/Molecular Science and Engineering, Washington, DC was awarded the 2003 $2,500 Homeland Security Award in the Biological, Radiological, Nuclear field. Dr. Ligler has pioneered the development of ultra-sensitive antibody-based detection systems for biological agents and other hazardous materials, and for the ability to develop a biological sensor from concept to commercial product. This work has had a profound impact on the development of biosensor-based detection of biological warfare agents over the past 17 years, leading to significant improvements in the nation's capability for early and accurate detection.



Photo of Daniel V. LimDaniel V. Lim, Ph.D.
Daniel V. Lim, Ph.D. - Professor of Microbiology, Department of Biology and Center for Biological Defense, University of South Florida, Tampa, FL, was awarded the 2004 $5,000 Homeland Security Award in the Biological, Radiological, Nuclear field. Dr. Lim was selected for his work in developing a test capable of identifying the presence of anthrax, ricin and other bioterrorism hazards in food, water and blood. He works closely with companies, Federal and State agencies, the military and other universities on development and implementation of these rapid detection procedures. Dr. Lim is also associated with the USF Center for Biological Defense and is routinely invited to speak on the subjects of biodefense and biothreat agents at national conferences and workshops.


Photo of Maya LinMaya Lin
Ms. Maya Lin, owner of the Maya Lin Studio in New York City, has won international acclaim for her site-specific art and architecture projects. Ms. Lin was awarded the 2000 $10,000 Frank Annunzio Award in the Arts/Humanities field. Ms. Lin's work, which has been praised as both serene and profoundly powerful, encompasses the dualities of art and architecture, as well as the artist's own Asian-American heritage.


Photo of William P. Magee, Jr. William P. Magee, Jr. M.D.
Dr. William P. Magee Jr., CEO and Co-founder, Operation Smile, Inc., Norfolk, VA, was a $50,000 Frank Annunzio Award recipient in the Arts/Humanities/Humanitarian field in 2002. Dr. Magee's work with Operation Smile has provided reconstructive surgery and related health care to indigent children and young adults in developing countries and the United States. Globally, Operation Smile has trained thousands of physicians and other health professionals who volunteer their time to perform advanced medical procedures in their own local hospitals, dramatically improving the quality of life for tens of thousands of children.


Photo of Douglas L. McMakin Douglas L. McMakin
Douglas L. McMakin, Staff Engineer in the Applied Physics Group at Pacific Northwest National Laboratory, operated by Battelle for the U.S. Department of Energy, Richland, WA. Mr. McMakin was awarded the 2007 $25,000 Homeland Security Award for the development of the first-of-its-kind personnel security system that safely detects non-metallic and metallic objects, including explosives that might be worn by a suicide bomber. The system provides a safe, fast and effective alternative to metal detectors, X-ray machines and pat-down searches at security checkpoints. As Project Manager and Technical Lead at the Radar Imaging Laboratory, where he has worked since 1987, Mr. McMakin and his team developed and tested innovative real-time microwave and millimeter-wave holographic-imaging systems for airport personnel screening for the U.S. Federal Aviation Administration (now the TSA) and body-measurements for biometrics and clothing applications using various planar and cylindrical imaging techniques. Mr. McMakin was very active in the commercialization of these technologies with two licensed partners L-3/SafeView (www.safeviewinc.com) and Intellifit (www.intellifit.com).


Rosalyn Queen Alonso, Foundation Chair and James D. Otvos, Ph.D.
Dr. James D. Otvos, Chief Scientific Officer and Founder of LipoMed, Raleigh, NC, was awarded the 1999 $100,000 Christopher Columbus Foundation Award for the development of the nuclear magnetic resonance (NMR) LipoProfile. An innovation in blood cholesterol testing, the LipoProfile distinguishes between high-risk and low-risk forms of cholesterol which could prevent heart disease.

 



Photo of M. Ian Philips, Ph.D.M. Ian Phillips, Ph.D.
Dr. M. Ian Phillips, University of Florida, College of Medicine, Gainesville, FL, was a 2002 $50,000 Frank Annunzio Award recipient in the Science/Technology field. Dr. Phillips has applied his 30 years of medical research and teaching to the study of cardiovascular disease that affects millions of people. Most recently, Dr. Phillips has developed new ways of treating hypertension with gene therapy. His research team also developed a gene "switch" that "turns on" protective genes when a heart attack begins in response to oxygen deprivation. These "vigilant vectors" provide cardioprotective genes to reduce heart damage from repeated attacks. Dr. Phillips believes this technique could be applied to a host of other chronic diseases such as diabetes, stroke and lung disease.



Photo of Ace SarichAce Sarich
Ace Sarich - Vice President, VoxTec, a Division of Marine Acoustics, Inc. Annapolis, MD, was awarded the 2004 $5,000 Homeland Security Award in the Information Sharing field. VoxTec solely develops and manufactures the Phraselator®, a handheld, voice-actuated translation device being used worldwide by American soldiers and domestically in law enforcement and healthcare settings. The Phraselator® is capable of speaking thousands of phrases in nearly 60 languages. It is used to provide instructions, give directions or ask questions with easily conveyed responses. Mr. Sarich travels frequently to the Middle East where he trains soldiers in the field on the use of the Phraselator®.


Photo of Wendy R. Shugol Wendy R. Shugol
Ms. Wendy R. Shugol, a teacher at Falls Church High School, Falls Church, VA, was awarded the 2001 $5,000 Freida J. Riley Teacher Award. Ms. Shugol was injured in an automobile accident soon after completing college and before beginning her teaching career. The head injuries sustained in the accident subsequently resulted in a diagnosis of Cerebral Palsy. Despite her condition, Wendy went on to fulfill her dream of becoming a special education teacher with an even deeper understanding and appreciation of what her own disabled students must encounter daily. She has earned the respect of her peers, students and their parents for having high expectations for her students and the willingness to provide the necessary support for them to achieve.


Photo of James A. Thomson, V.M.D., Ph.D., Diplomate A.C.V.P. James A. Thomson, V.M.D., Ph.D., Diplomate A.C.V.P.
James A. Thomson, V.M.D., Ph.D., Diplomate A.C.V.P. - John D. McArthur Professor, Department of Anatomy, University of Wisconsin Medical School and The Wisconsin National Primate Research Center, Madison, WI. Awarded the 2003 $50,000 Frank Annunzio Award for his research in the field of embryonic stem (ES) cells to improve knowledge of basic reproductive biology, and to explore using ES-derived cells to treat health problems such as diabetes, heart disease, leukemia and degenerative neurological diseases such as Parkinson's, amyotrophic lateral sclerosis and multiple sclerosis.


Photo of Joanne B. Tindall Joanne B. Tindall
Joanne B. Tindall – Teaching principal at the W.F. Tallman School, Nashville Transition Center, for the Tennessee Department of Children’s Services, Nashville, TN, is the recipient of the 2007 $10,000 Freida J. Riley Teacher Award. Doctors told Joanne’s parents that she would most likely be mentally retarded, would never walk or talk, and should possibly be institutionalized due to her premature birth and diagnosis of cerebral palsy at age two. Defying the doctors’ dire predictions, Joanne quickly learned to walk and talk and has worked hard to remain ambulatory. Far exceeding the school system’s expectations, she was quickly mainstreamed from self-contained special education classrooms into inclusion classrooms not only by graduating from high school as a National Honor Society student, but graduating as a member of Phi Beta Kappa from Tennessee Technological University with a teaching degree in special education, followed by a Master’s Degree in Administration and Supervision. Building on the lessons learned through her own experiences as a disabled student, Joanne was determined to become a teacher and make a difference in her students’ lives. She has dedicated her career to working with students with all types of special needs. After teaching for a few years, she began working as a crisis hotline phone counselor on weekends at a mental health center. This soon led to teaching GED classes to adult clients in the alcohol drug treatment facility and then the lead teacher and principal position of the adolescent day-treatment program. This eventually led to her current position as a teaching principal in a State-operated juvenile justice facility, where many of her students have earned regular diplomas, GEDs, or special education diplomas in this very difficult teaching and learning environment.


Photo of Charles H. Townes, Ph.D. Charles H. Townes, Ph.D.
Dr. Charles H. Townes, Professor in the Graduate School, University of California at Berkeley, Berkeley, CA, was awarded the 1999 $100,000 Frank Annunzio Award for his research on the microwave spectra of molecules and the ultimate invention of the laser.


Photo of Jennifer West, Ph.D. Jennifer West, Ph.D.
Jennifer West, Ph.D. - Isabel C. Cameron Professor of Bioengineering and Professor of Chemical Engineering, Rice University, Houston, TX, was awarded the 2004 $50,000 Frank Annunzio Award for her research in biomaterials and tissue engineering focusing on the synthesis, development and application of novel biofunctional materials and on the use of biomaterials and engineering approaches to study biological problems. One area of Dr. West's research involves tissue engineering aimed at creating new materials for small-diameter vascular grafts. A related area of Dr. West's research involves the use of bioengineering to combat restenosis, a complication that often arises after angioplasty, the balloon procedure used to open clogged arteries. She is developing polymer materials that can be coated on arteries after they are opened with the balloon. The polymers release nitric oxide, a chemical that helps arteries heal without the clotting and scar tissue formation associated with thrombosis.


Photo of Dr. John J. Wild John J. Wild, M.D., Ph.D.
Dr. John J. Wild, Director, Medico-Technological Research Institute of Minneapolis, St. Louis Park, MN, was awarded the 1998 $100,000 Frank Annunzio Award for being the pre-eminent pioneer of modern diagnostic medical ultrasound.


Kensall D. Wise, Ph.D.
Dr. Kensall D. Wise, Professor of Electrical Engineering and Computer Science at the University of Michigan, Ann Arbor, MI, was awarded the 1996 $100,000 Christopher Columbus Foundation Award for his creation of "microprobes," tiny electronic devices implanted in the brain for stimulating and monitoring the activity of nerve cells.


Jonathan Woodward, Ph.D.
Dr. Jonathan Woodward, Senior Research Scientist at Oak Ridge National Laboratory, Oak Ridge, TN, was awarded the 1997 $100,000 Christopher Columbus Foundation Award for the development of an enzymatic method to produce hydrogen from abundant renewable sugar.


Ray Wu, Ph.D.
Dr. Ray Wu, Professor of Biochemistry/Molecular Biology, Cornell University, Ithaca, NY, was a 2002 $50,000 Frank Annunzio Award recipient in the Science/Technology field. Dr. Wu used a novel, location-specific primer-extension strategy that made his DNA sequence analysis possible. His strategy has been incorporated into subsequent generations of rapid procedures, including the use of automated instruments, which has led to the decoding of entire genomes of many living organisms. Information on these sequences is essential for improving health care and increasing food security in the next several decades. Based on Dr. Wu's keen knowledge of DNA, genes and rice biotechnology, he has developed techniques to produce drought- and salt-tolerant transgenic rice plants. The same genes and methods have the potential to dramatically increase production of all major cereal crops, which is crucial for third world countries.