Theory: Annie Jacobsen's book 'Area 51' documents a new even more bizarre theory of the Roswell crash landing, involving the ex Soviet leader and 'Angel of Death' Dr Mengele
Aliens? The new theory suggests it was not aliens who landed in Roswell, but a group of mutant child-like pilots engineered by Dr Mengele and orchestrated by Joseph Stalin
Joseph Stalin (left) and Josef Mengele are said to be behind the plot to scare Americans witless
Cover up? U.S. Army personnel examine the debris from the Roswell Crash in 1947. After initially reporting it was a 'saucer' officials changed to saying it was a downed weather balloon
Captured: the Nazi Horton 229 'Flying Wing' that was taken by the Soviets after the end of World war Two and also allegedly used in the Roswell plot