The Controversial Zeppelin Stamps That Enraged 1930s Collectors

(via Atlas Obscura)  On May 21, 1930, the world’s biggest airship, the Graf Zeppelin, floated over the Cape Verde Islands and slowed down over an unusual target: the Porto Praia post office. When the ship had maneuvered to just the right spot, its crew threw something out of the gondola, attached to a small parachute. The object fluttered down from the sky and landed on the building’s roof. It was a big sack of mail.