D.B. Cooper lead called 'promising'05:22
The FBI is pursuing what one investigator termed a "promising" lead into the identity of D.B. Cooper, the name used by a man who escaped a hijacked 727 jetliner 40 years ago with a $200,000 ransom using a parachute. TODAY's Lester Holt explores the mystery with Geoffrey Gray, the author of the latest book on the case.