Just as yesterday was the anniversary of the Apollo One accident, today is the anniversary of the Challenger disaster. The loss of the Space Shuttle Challenger, with all its crew, was a big setback for the U.S. space program. It was also an event that had a huge influence on my life. Alas, I do not have time to recount that tale today. Instead I will simply share this touching video about astronaut Ronald McNair, one of the seven astronauts that perished twenty seven years ago today.