Though best known as the commander of Apollo 13, Lovell flew two Gemini missions. His first was Gemini 7 in December of 1965, a twelve day endurance test that would prove the astronauts were up to two weeks in space, the average time for a mission to the Moon. I asked Lovell what the worst part of the mission was. He said the flight was basically just two weeks in a latrine, and, chuckling, adding, “We got by.” The Gemini spacecraft allowed the crew about as much room as the front seat of a small car. Lovell said the only way he — or anyone for that matter — could survive any length of time in that spacecraft was the microgravity environment that allowed them to use its full volume. But still, he and Frank Borman were crossing off the days on a little calendar throughout the flight. On the plus side, they had a brilliant view of the Earth and plenty of time to look out the windows, which was nothing short of incredible.