Science: Foo-Fighter

If it was not a hoax or an optical illusion, it was certainly the most puzzling secret weapon that Allied fighters have yet encountered. Last week U.S. night fighter pilots based in France told a strange story of balls of fire which for more than a month have been following their planes at night over Germany.* No one seemed to know what, if anything, the fireballs were supposed to accomplish. Pilots, guessing that it was a new psychological weapon, named it the "foo-fighter."

Their descriptions of the apparition varied, but they agreed that the...

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