Apollo 11 & Viking 1
Today in 1969, Apollo XI astronauts Neil Armstrong and Edwin "Buzz" Aldrin became the first men to walk on the moon, after their lunar module separated from the command module and landed on the lunar surface at 09:18 GMT on the Sea of Tranquillity. Neil Armstrong and Edwin Aldrin establish Tranquility Base while Michael Collins remained in the Apollo craft and orbited above. When Armstrong stepped on the lunar surface he proclaimed, "That's one small step for a man, one giant leap for mankind." Back on Earth nearly 700 million television viewers witnessed the event live as it happened. It is truly one of the greatest ever feats of engineering and human endeavour and a pivotal day in the history of mankind.