“Houston, we’ve had a problem…” Command module pilot Jack Swigert, Jr. uttered what might be one of the greatest understatements of the 20th century as oxygen leaked from the crippled Apollo 13 spacecraft as it hurtled toward the moon at 25,000 miles per hour. A number of seemingly insignificant events should have warned NASA of the impending catastrophe, but no one put the pieces together in time.