When Neil Armstrong Aldrin reflected on Apollo 11, they were looking backward at a moment that reshaped history.

The Apollo missions showed exact science at work. Each part needed to be close to perfection from start to finish. NASA succeeded with 1960s tools—a remarkable feat. Though it was still cutting-edge ...

A half-century ago, in the middle of a mean year of war, famine, violence in the streets and the widening of the generation gap, men from planet Earth stepped onto another world for the first time, ...