After years of setbacks, NASA’s SLS moon rocket is ready to fly

Its launch will be a milestone in the agency's quest to return astronauts to the moon. After years of cost overruns and delays, damning reports by government watchdogs and criticisms from space enthusiasts and even parts of its own leadership, NASA's SLS moon rocket is ready to fly. Christian Davenport investigates what this means for the agency and America's future lunar pursuits.