NASA administrator Sean O'Keefe, in a news conference Saturday afternoon, said there was "no indication that the mishap was caused by anything or anyone on the ground."
Shuttle Commander Rick D. Husband, Pilot William C. McCool, Payload Commander Michael P. Anderson, Mission Specialists David M. Brown, Kalpana Chawla and Laurel Clark and Israel's first astronaut, Ilan Ramon, were killed.
