60 Minutes: Season 39, Episode 43

39 - 43:

Bob Simon reports on James Joseph Dresnok, the last U.S. defector still living in North Korea, who is profiled in the documentary “Crossing the Line.” The film's producers, Daniel Gordon and Nicholas Bonner, are interviewed. Morley Safer interviews TV producer-director Sam Simon about his foundation that rescues stray dogs and trains them to aid the deaf; Lesley Stahl reports on crime-scene DNA evidence.