The WwlI Foo Fighters Mystery Explained ｜ History's Greatest Mysteries (S4))

During World War II, a fiery phenomenon terrorizes American airmen in the night skies over Europe. The pilots call these fireballs “Foo Fighters,” and swear they move at over 200 mph and defy the laws of physics. But what are they? What’s the hidden truth behind the mysterious Foo Fighters of World War II? …