NASA will pay homage to its fallen astronauts Friday (Jan. 31) with an agency-wide "Day of Remembrance," a ceremony that comes amid a somber week of spaceflight disasters for the space agency. <br /> <br />This week marks the anniversaries of three fatal NASA tragedies: the Apollo 1 fire of 1967, the space shuttle Challenger disaster of 1986 and the Columbia shuttle disaster of 2003. NASA chief Charlie Bolden — a former space shuttle commander — and other officials will pay respect to those lost in the accidents during a wreath-laying ceremony at Arlington National Cemetery Friday morning. <br /> <br />"NASA's Day of Remembrance honors members of the NASA family who lost their lives while furthering the cause of exploration and discovery," NASA officials wrote in a statement. <br /> <br />Credit: NASA
