CAPE CANAVERAL, Fla. (AP) — Schoolchildren joined NASA managers and relatives of the lost crew of space shuttle Columbia on Friday to mark the 10th anniversary of the tragedy and remember the seven astronauts who died.

More than 300 people gathered at Kennedy Space Center for the outdoor ceremony, just a few miles from where Columbia was supposed to land on Feb. 1, 2003, following a 16-day science mission. It never made it, bursting apart in the sky over Texas, just 16 minutes from home.

Representing the families of the Columbia seven, the widow of commander Rick Husband told the hushed audience that the accident was so unexpected and the shock so intense, "that even tears were not freely able to fall."