James Swigert, James Lovell or Fred HaiseView of the severely damaged Service Module photographed following the jettison Apollo 13, 11-17 April 1970Vintage gelatin silver print on resin-coated paper, 25.3 x 20.5 cm (10 x 8 in), with THIS PAPER MANUFACTURED BY KODAK and a NASA caption on the verso (mid-1970s print)As seen here, an entire panel on the SM was blown away by the apparent explosion of oxygen tank number two located in Section 4 of the SM. Two of the three fuel cells are visible jt forward (above) the heavily damaged area. Three fuel cells, two oxygen tanks, and two hydrogen tanks are located in Sector 4. The damaged area is located above the S-band antenna.(...) The damage to the SM caed the Apollo 13 crewmen to e the Lunar Module as a 'lifeboat'. The LM was jettisoned jt prior to the Earth re-entry by themand Module (NASA caption)