 Complete the following phrase:  Prior to the first flight of the Space Shuttle, he provided astronaut support in Orbiter engineering development and testing. He was a T-38 chase pilot for the second and third Shuttle flights and support crewman for the first operational Shuttle flight, STS-5. Covey also served as Mission Control spacecraft communicator CAPCOM for Shuttle Missions STS-5, 6, 61-B, 61-C, and 51-L it was his voice that said the now infamous words, Challenger, go at throttle up shortly before the 