The Battle of Los Angeles 1942: Unidentified Objects, Searchlights, and the Unresolved Mystery
To the point
February 1942 in Los Angeles saw anti-aircraft batteries fire on unidentified flying objects, no aircraft were found, and no conclusive explanation emerged, leaving the incident an open question of enemy attack, wartime nerves, or something beyond this world, as discussed in Terrenz Sword's 2002 book.