When Neil Armstrong took his fateful 'one small step' almost exactly 50 years ago, it was the culmination of an extraordinary effort that had begun back in 1961 when President Kennedy vowed that America would land a man on the moon before the decade was out.

The Atlantic and its Enemies: A Personal History of the Cold War

Homer Stewart, an early pioneer of rocket research who helped develop the first successful US satellite, Explorer I, has died aged 91.