The jettisoned Service Module of the Apollo 13 spacecraft, photographed as the beleaguered Command Module was preparing for reentry. The seventh manned mission in the Apollo space program, Apollo 13 was launched on April 11, 1970. It was commanded by James A. Lovell, with John L. "Jack" Swigert and Fred W. Haise as crew. After an oxygen tank exploded on April 13, the Service Module was crippled and a planned lunar landing was aborted. Despite great hardship caused by limited power, loss of cabin heat, shortage of potable water, and the critical need to make makeshift repairs to the carbon dioxide removal system, the crew returned safely to Earth on April 17, 1970.Photograph: NASA