Nancy Rivard gave up a fast-track management job at an airline to sign on as a flight attendant so she could see first-hand what the needs are of people around the world. From her first "mission" of hand-delivering soaps to Bosnian refugees, she's grown an organization, Airline Ambassadors, whose thousands of volunteers have brought stricken people over $50 million worth of aid. Current focus: training airline staff to recognize trafficking on their flights--and intervene.