The West coast air raid, sometimes referred to as the Los Angeles air raid, Los Angeles Air Alarm or the battle of Los Angeles, was an unidentified flying object event which took place from late February 24 to early February 25, 1942 in which eyewitness reports of an unknown object or objects over Los Angeles, California triggered a massive anti-aircraft artillery barrage.
Initially the target of the barrage was thought to be an attacking force from Japan, but it was later suggested to be a lost weather balloon, a blimp, a Japanese fire balloon or psychological warfare technique, staged for the benefit of coastal industrial sites, or even an extraterrestrial aircraft. The true nature of the object or objects remains unknown
The image on the front page of the Los Angeles Times after the "Air Raid"; the caption read "SEEKING OUT OBJECT - Scores of searchlights built a wigwam of light beams over Los Angeles early yesterday morning during the alarm. This picture was taken during blackout; shows nine beams converging on an object in sky in Culver City area. The blobs of light which show at apex of beam angles were made by anti-aircraft shells."