Nasa launches mission to save falling space telescope

WASHINGTON — After two delays in two days, Nasa has finally launched the Link spacecraft tasked with preventing one of its most successful space telescopes from gradually falling back to Earth.The agency's Swift Boost mission sent the LINK robotic spacecraft into orbit at around 2 pm on Friday.The spacecraft will now attempt to catch, dock and push the ageing Neil Gehrels Swift Observatory into a higher orbit, extending its scientific life by several years.The rescue mission has never been