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KENNEDY SPACE CENTER, FLA. -- The Apollo 11 Saturn V space vehicle, at Launch Pad 39A, awaits the liftoff scheduled for 9:32 a.m. EDT today, along with astronauts Neil A. Armstrong, Michael Collins and Edwin E. Aldrin Jr. During the planned eight-day mission, Armstrong and Aldrin will descend in a lunar module to the Moon's surface while Collins orbits overhead in the command module. The two astronauts are to spend 22 hours on the Moon, including two and one-half hours outside the lunar module. They will gather samples of lunar material and will deploy scientific experiments which will transmit data about the lunar environment. They will rejoin Collins the command module for the return trip to Earth