Obesity GUEST: DAVID ALLISON, Ph.D. *Associate Research Scientist at the Obesity Research Center at St. Luke's/Roosevelt Hospital in New York City *Associate Professor of Medical Psychology at Columbia University Prof. AVIVA MUST * Associate Professor, Department of Family Medicine and Community Health at Tufts University School of Medicine in Boston * Scientific staff, Human Nutrition Research Center on Aging at Tufts Mr. ALLEN STEADHAM * Director, International Size Acceptance Association Americans have a reputation for being health-conscious... new fads in excercise and diet seem to appear every few months. Yet obesity remains a serious health problem in the U.S., and it's getting worse. Why are so many Americans so overweight? Is it diet? Culture? Environment? Join Melinda Penkava and guests to discuss the latest research on obesity in America.