S70-36485 (April 1970) --- These three astronauts are the prime crew of the National Aeronautics and Space Administration's (NASA) Apollo 13 lunar landing mission. Left to right, are James A. Lovell Jr., commander; John L. Swigert Jr., command module pilot; and Fred W. Haise Jr., lunar module pilot. Apollo 13 will be the United States' third lunar landing mission.