"[The flight director] looked at me and shook his head, and I knew they were gone." Gerald Griffin talked to American History TV about what it was like in Mission Control on the day Challenger was lost. This Saturday at 4:30 PM ET on C-SPAN 2, former NASA flight director Gerald Griffin discusses his career in the American space program. He talks about directing Apollo missions along with overseeing the Johnson Space Center in Houston, Texas. | American History TV