Debris from the space shuttle Columbia streaks across the sky over Tyler, Texas, Saturday, Feb. 1, 2003. (AP Photo/Tyler Morning Telegraph, Dr. Scott Lieberman)
Debris from the space shuttle Columbia streaks across the sky over Tyler, Texas, Saturday, Feb. 1, 2003. (AP Photo/Tyler Morning Telegraph, Dr. Scott Lieberman)
Tiffany Barney, 19, of Friendswood, Texas, places flowers at the entrance of the Lyndon B. Johnson Space Center, Saturday, Feb. 1, 2003, in Clear Lake, Texas. (AP Photo)