On July 20, 1969 humans first set foot on Earth’s moon. By the end of 1972, the Apollo program’s firsthand exploration of the Moon would be over.

At the Challenger Learning Center, missions to the Moon or Mars are planned every day… in simulation.

A Challenger Learning Center Flight Director talks about what it took to get to the Moon 50 years ago, what it will take to get back.

View the transcript here.