Small Changes Can Make a Big Difference

On April 13, 1970, Apollo 13 crew experienced a sharp bang and a vibration followed by warning lights. "Houston, we've had a problem," reported Jack Swigert to NASA ground control. About 200,000 miles from Earth, oxygen tank #2 had exploded and caused tank #1 to fail, leaving astronauts Swigert, Lovell and Haise without the normal […]

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