The new evidence in the hunt for "DB Cooper"

After hijacking an airplane and extorting $200,000 from the FBI, DB Cooper calmly made a daring escape via parachute. Forty years later, new evidence suggests law enforcement may finally be hot on the trail of America's most elusive fugitive. But what is this new evidence? » 8/01/11 10:30am 8/01/11 10:30am