50 years ago, between July 1969 and December 1972, we landed a dozen Americans on the Moon. The #Apollo50 anniversary serves as a reminder of how the first views of Earth from the Moon transformed the way we see ourselves as humans. Apollo may have ended in 1972, but the Moon has remained of great interest to us and scientists around the world. With Space Policy Directive-1, President Trump refocused our work with international and commercial partners to go back to the Moon, with an eye to event