41D-3186 (4 Sept 1984) --- Astronaut Robert L. Crippen, 41-G crew commander, prepares to join his six fellow crewmembers for some training in the mockup and integration laboratory at the Johnson Space Center. Astronaut David C. Leestma, 41-G mission specialist, left, will participate in a scheduled extravehicular activity (EVA) on the Challenger's next mission. Today's training is for launch phase procedures.

41D-3188 (2 September 1984) --- Astronaut Kathryn D. Sullivan, 41-G mission specialist, joins with other members of the seven-person crew prior to a training session in the Shuttle mockup and integration laboratory at the Johnson Space Center. Dr. Sullivan will be the first American woman to perform an extravehicular activity (EVA) in space when she joins Astronaut David C. Leestma for some outside-the-Challenger duty on October 9. The mission is scheduled for an October 5, 1984 launch.

41D-3138 (4 Sept 1984)--- Canada's backup payload specialist assists the two 41-G prime payload specialists during a training session in the Johnson Space Center's Shuttle mockup and integration laboratory. Robert Thirsk (without helmet) represents the National Research Council (NRC) and is backup to Marc Garneau (nearest camera), also of the NRC. Paul D. Scully-Power, seated in the other middeck seat for the launch phase, is a civilian oceanographer with the U.S. Navy. The 41-G flight aboard the Challenger is NASA's first to utilize a crew of more than six persons. This photograph was taken by Otis Imboden.