Consider this as a possible scenario. You are on a flight from Lisbon, Portugal to New York City and, in the dead of night over the middle of the Atlantic Ocean, the pilot’s voice on the intercom suddenly jolts you awake with these words, “Can I have your attention please. This is Captain Williams. We’re in an emergency situation. We may have to ditch.” You might be able to ditch your girlfriend, boyfriend or spouse but it’s not so easy to ditch a plane as demonstrated by the principles of Crash Landing (1958).