‘Change in Velocity’: Remembering Deke Slayton’s Unrealized Mercury Mission (Part 1)

Deke Slayton, one of the “Original Seven” NASA astronauts, was grounded from his Mercury mission 55 years ago, this month. Photo Credit: NASA

Fifty-five years ago, America was a nation in euphoria. Astronaut John Glenn returned triumphantly to Earth on 20 February 1962, after orbiting Earth three times in his Mercury capsule—named “Friendship 7”—and [...]