<p><br /> The space shuttle Discovery has landed safely at the Kennedy Space Center in Florida after a 15-day resupply mission to the International Space Station.<br /> </p><p><br /> Discovery and its seven astronauts glided to a smooth landing on Tuesday at 9:08 am local time, completing the 131st mission of the shuttle program. Bad weather had delayed a scheduled return on Monday.<br /> </p><p><br /> The mission had already been lengthened by a day so that astronauts could use the space station's communications system to relay heat shield inspection results.<br /> </p><p><br /> Nasa discovered the shuttle's communications antenna was broken shortly after Discovery's launch on April 5.<br /> </p><p><br /> The inspection procedure came into place after the 2003 Columbia disaster which was blamed on a heat shield breach.<br /> </p><p><br /> Discovery's return leaves just three shuttle flights on Nasa's schedule before the ships are retired at the end of the year.<br /> </p><p><br /> Sister ship, Atlantis, is due to be rolled out to the launch pad on Tuesday evening to be prepared for a May 14 liftoff.<br /> </p>
