The Battle of Los Angeles

On the night of February 25th, 1942, the U.S. Army fired 1,440 anti-aircraft shells into the sky over Los Angeles and found nothing. No wreckage. No enemy. No explanation that has ever fully held. The Battle of Los Angeles remains one of the strangest events of World War II on American soil, a night that launched competing theories about mass hysteria, secret technology, government cover-up, and something no official report has ever been willing to name. What was in that sky? And why did the answer matter so much to so many people, for so many different reasons?