CAPE CANAVERAL, Fla. - A full year after the Columbia tragedy, NASA has finally determined how and why the large piece of foam insulation that doomed the spacecraft broke off from the fuel tank at ...

NASA had no idea that pieces of foam insulation were breaking off space shuttle fuel tanks so often at liftoff or that the hand-applied material was full of flaws, Columbia accident investigators say.

SPACE CENTER, Houston -- A day after all but ruling it out as a leading cause, NASA said Thursday that investigators are still considering whether a piece of insulating foam that struck Columbia's ...

SPACE CENTER, Houston -- After days of analysis, NASA backed away Wednesday from the theory that a piece of foam that struck Columbia during liftoff was the root cause of the space shuttle's ...