Overview:A two-part profile of John F. Kennedy begins with his early years, detailing the health challenges he faced; his heroism after his PT boat was hit by an enemy destroyer during World War II; his first run for Congress; and the 1960 presidential race, which featured the first televised presidential debates. Among those sharing insights are his sister Jean Kennedy Smith and niece Kathleen Kennedy Townsend; presidential biographers Robert A. Caro and Robert Dallek; and historian David Nasaw.