(Oklahoma City-AP) -- Governor Brad Henry ordered all state flags flown at half-staff today and asked Oklahomans to watch out for debris from the space shuttle Columbia.
Henry says there is a potential that some debris could have fallen in Oklahoma, although none has been found.
He warned that the debris could be toxic and asked residents to notify authorities if they see anything suspicious.
The governor says he spoke to Oklahoma relatives of Columbia crew member Lieutenant Colonel Michael Anderson, who plan to go to Houston to be with Anderson's wife and family.
Anderson's niece, Dee Dee Durnham, is a fourth-grader at Longfellow Elementary in Oklahoma City. She traveled to watch her uncle take off for his second flight in space two weeks ago.
Henry also spoke to members of the Oklahoma Jewish community who knew Israel's first astronaut, Ilan Ramon.