SpaceX's Falcon 9 rocket on Sunday returned safely to Earth, touching down at Landing Zone 1 after launching the Dragon spacecraft into low-Earth orbit. "As with previous first stage land and drone-ship landings from SpaceX, this achievement is a testament to the leadership and innovation of America's commercial space industry," said NASA spokesperson Cheryl Warner. The Dragon's 5,000-lb. payload included an international docking adapter that will enable commercial spacecraft to dock to the station when transporting astronauts.