Today, NASA pays homage to its fallen astronauts with an Agency-wide "Day of Remembrance." This week marks the anniversaries of three NASA tragedies: the Apollo 1 fire of 1967, the Challenger disaster of 1986 and the Columbia disaster of 2003. Read more about the ceremony on



I'm not trying to be smart or disrespectful, but what is it with NASA and accidents in January? It seems incredible to me to have three accidents happen in the same week of the same month and Challenger is the only accident that was weather related.