Slightly OT, but as AA 191 was mentioned, it reminds me of one of my favorite stories about my wife.

A few years ago she was flying MCO-ORD and realized that coincidentally, it was May 25th and the flight number was 191 (United). This was a very eerie coincidence for her. When she was a very young girl, her family was going to Los Angeles for a wedding on May 24, 1979 on AA 191. However, they had to drive to ORD from their home in SBN and ended up missing their flight, so AA rebooked them for the same flight the next day. The next day, she and her family would have been on AA 191, however by chance they showed up at the airport early and the airline put them on the next earlier flight. Being long before the cell phone age, they were all safely en route to LAX when 191 went down, and everyone in LA had no idea they had gotten on an earlier flight.

Another eerie coincidence is that the infamous DL crash of an L1011 in DFW due to a thunderstorm downdraft was also flight #191. Perhaps that number should have been retired.