Inspectors find fourth crack in Discovery space shuttle

Inspectors have found a fourth crack in support beams on the external fuel tanks of the space shuttle Discovery, whose final flight was delayed because of a hydrogen leak, NASA said. The latest crack was found while technicians were removing foam while inspecting the support beams, which are called stringers, in the aftermath of the hydrogen leak, the space agency said late on Monday. Two nine-inch (21-centimeter) cracks were found in an adjacent support beam on Friday, and a three-inch (7.5 centimeter) fissure was uncovered over the weekend. More

(Source: AFP - Nov 17)