Apollo 13 prime crewmembers during water egress training

S70-24010 (17 Jan. 1970) --- The three prime crew members of the Apollo 13 lunar landing mission stand by to participate in water egress training in a water tank in Building 260 at the Manned Spacecraft Center (MSC). They are astronauts James A. Lovell Jr., (left) commander; Fred W. Haise Jr., (right) lunar module pilot; and Thomas K. Mattingly II (in background, obscured by Haise), command module pilot.