“Considered Top Secret”: The FBI’s 1949 “Vital Installations” Memo and the Green Fireballs

Part 23 of a series reassessing the documentary record behind the 1933 Magenta narrative. TL;DR The FBI marked its January 1949 memo Confidential. Inside, it reported that Army and Air Force intelligence officers considered the subject “top secret.” The green fireballs prompted searches and a camera program. Investigators found copper in samples taken both before and after the fireball they were studying. Project Twinkle filmed daylight objects after a missile test. Holloman gave little weigh...