Cool Science Radio welcomes Charlie Precourt, a veteran of four space flights—including two as mission commander—and has logged more than 932 hours in space. Precourt was also deputy program manager for the International Space Station, chief of the astronaut corps and director of operations for NASA at the Gagarin Cosmonaut Training Center in Star City, Russia. He is currently the Vice President and General Manager of the Propulsion Systems Division for Northrop Grumman’s flight systems group