Lessons Linger 25 Years After Challenger Tragedy
The explosion of the space shuttle Challenger in 1986 "was a trauma to the nation's psyche," says Sen. Bill Nelson, a former astronaut. But NASA and the American public have learned a few things about space science since then.
Source: http://www.npr.org/2011/01/27/133238665/25-years-after-challenger-space-still-dangerous?ft=1&f=1007