美作家新书揭秘:没外星人 是纳粹改良人种(组图)

　　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