Bush to families:
'Entire nation grieves with you'

My fellow Americans, this day has brought terrible news and great sadness to our country. At 9 o'clock this morning, Mission Control in Houston lost contact with our space shuttle Columbia. A short time later, debris was seen falling from the skies above Texas. The Columbia's lost. There are no survivors. Onboard was a crew of seven --

Space Shuttle Columbia crew, left to right, front row, Rick Husband, Kalpana Chawla, William McCool, back row, David Brown, Laurel Clark, Michael Anderson and Israeli astronaut Ilan Ramon are shown in this undated crew photo.

AP Photo/NASA, FILE