Bush: 'Columbia is lost' (0) WASHINGTON, Feb. 1 (UPI) -- President George W. Bush paid tribute Saturday to the seven Columbia crew members who were lost as their space shuttle broke up at the end of a 16-day mission, calling them men and women who assumed great risk in service to humanity. "The Columbia is lost; there are no survivors," Bush said during a televised address from the White House. Advertisement Bush spoke to a grieving nation stunned over the loss of the crew members who were killed as their shuttle traveling at more than 18 times the speed of sound and 200,000 feet above Texas broke apart. The shuttle was just minutes away from the Kennedy Space Center in Florida.