Space shuttle Discovery's final flight keeps getting delayed, according to AP. The space station delivery mission is now off until the end of February. NASA had been aiming for an early February liftoff, but managers decided Thursday to take more time to complete repairs to Discovery's external fuel tank. Following a failed launch attempt in early November, cracks were found in metal struts of the massive tank. More cracks were discovered last week, after the shuttle was returned to its hangar. NASA is considering reinforcing all 108 struts on the central part of the tank for extra safety, NASA spokesman Allard Beutel said Friday. -- SPA
