S69-25885 (3 March 1969) --- Technicians in the white room atop Pad A, Launch Complex 39, Kennedy Space Center, prepare to insert astronaut James A. McDivitt, Apollo 9 commander, into the spacecraft during a Countdown Demonstration Test. Also, taking part in the training exercise were astronauts David R. Scott, command module pilot; and Russell L. Schweickart, lunar module pilot. The Apollo 9 mission will evaluate spacecraft lunar module systems performance during manned Earth-orbital flight. Apollo 9 will be the second manned Saturn V mission.