Doug talks to journalist Annie Jacobsen about the mysterious Area 51. As Jacobsen reports it, you don't really need aliens to make the story of cold war experiments sound very strange. Based on interviews and declassified documents, Jacobsen explores how the government has pushed the boundaries of science with nuclear testing, top secret supersonic jets and other technology still being used today. Don't worry though - there's still a flying disc, a crash landing and bizarre pilots. (Rebroadcast)
