Hawaii imports 90 percent of its food; we meet a group of industrious Hawaiians living off the food grid. Over 1.5 million U.S. children have potentially fatal peanut allergies. Could new research lead to a cure? Gain an expert's view on the deep cultural language of samurai swords. The bald eagle, America's national symbol, was nearly extinct 40 years ago; we share its ongoing story of survival.