Synopsis: Obesity is fast becoming the single greatest killer of Americans, causing some experts to claim that we are on the cusp of an evolutionary disaster. Former Surgeon General Richard Carmona says, "obesity is a terror within; it's destroying our society from within and unless we do something about it, the magnitude of the dilemma will dwarf 9/11 or any other terrorist event that you can point out." The rates of obesity in the United States are climbing at unprecedented rates, with 75% of Americans projected to be overweight or obese within a decade. Killer At Large uncovers this epidemic, examining the causes and suggesting ways to reverse this deadly trend.