Michael Collins, who has died of cancer aged 90, was the often forgotten third man on the historic 1969 Apollo 11 space mission. While Neil Armstrong and Buzz Aldrin became the first humans to walk on the moon, he was circling it in the Columbia command module. With 650 million television viewers watching worldwide, Armstrong declared to those observing nervously back at Nasa’s mission control in Texas: “Houston. Tranquillity base here. The...