STS-51 Crew BriefingCommander Frank L. Culbertson, Jr. introduces the crew of STS-51, Pilot William F. Readdy, and Mission Specialists James H. Newman Ph.D., Daniel W. Bursch, and Carl E. Walz, in a preflight conference. Each crew member gives an overview of the mission activities, objectives, and payload (ACTS-TOS, ORFEUS-SPAS, etc.), and answers questions from the press.