More than 50 years after NASA’s last human mission to the moon, four astronauts are getting ready for the 10-day Artemis II mission around the far side of the moon. NASA sees Artemis II as a critical step toward landing astronauts on the lunar surface and using the moon as a gateway for future missions to Mars. The U.S. is in a race with China to get humans back on the moon. 60 Minutes reports, Sunday. | 60 Minutes