Elon Musk's SpaceX on Sunday postponed launch of an upgraded Falcon 9 rocket and an attempt to land the booster at the launch site, saying the tricky touchdown would have a better chance of success if delayed for 24 hours.<br />A smooth landing would provide a big boost to Musk's Space Exploration Technologies, or SpaceX, and its long-term ambition of refurbishing and reusing its rockets, an advance that could slash launch costs.<br />The mission, rescheduled for 8:33 p.m. ET on Monday, is the first for SpaceX since June 28, when the Falcon 9 failed during an attempt to deliver cargo to the International Space Station for NASA.<br />The revamped rocket will carry 11 small communications satellites for ORBCOMM Inc, which provides messaging services for retailers, shipping containers and others.
