Space Exploration Technologies Corp. (SpaceX) on Saturday successfully launched its fifth Cargo Resupply Services (CRS-5) mission for NASA, but came up short successfully landing its Falcon 9 rocket’s first stage on a floating platform.Company founder and CEO Elon Musk said Saturday on Twitter the first stage made it to the drone spaceport ship, but “landed hard.” Musk said the ship was “fine” following the landing attempt, but that some support equipment needed to be replaced. SpaceX spokesman John Taylor on…