Modern Marvels: They really shouldn't have survived. When an oxygen tank exploded in the command module of Apollo 13, the prospects for the three astronauts aboard were exceedingly grim. But they defied the odds. Under even the best circumstances, a space mission is an extraordinary accomplishment. But the conditions faced by the crew of Apollo 13 make the story of their survival one of the most memorable By interviewing space agency veterans and using NASA's own mission records, APOLLO 13 brings this inspiring story to life. See how scientists and engineers on the ground pored over every detail of the spacecraft's electrical, navigational and propulsion systems to devise a workable way to save the crew, and how the daring and skill of the astronauts made the scheme a success. Faced with the prospect of an unmitigated disaster, NASA rallied and forged an unlikely triumph that, many feel, stands as their finest hour.