13 Things that Saved Apollo 13

http://www.universetoday.com/62339/13-things-that-saved-apollo-13/ On the night of April 13th, 1970, when the oxygen tank in Apollo 13’s command module exploded, a 27-year-old engineer named Jerry Woodfill sat at his console in the Mission Evaluation Room at Johnson Space Center, monitoring the caution and warning system he helped create for the Apollo spacecraft.