Take a moment today to remember our fallen space heroes. On this day in 1986, the "worst accident in the history of the American space program" took place. It left NASA's space shuttle program grounded for over two years, and forever changed how we approach manned space exploration.
Today, the Challenger crew’s mission dedicated to education lives on in more than 40 Challenger Learning Centers. http://t.co/cgr2ih3N0g— Challenger Center (@ChallengerCtr) January 28, 2014