The unmanned Falcon 9 rocket launched by SpaceX, on a cargo resupply service mission to the International Space Station, lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. The unmanned Space Exploration Technologies Falcon 9 rocket blasted off from Florida on Saturday carrying a cargo capsule for the International Space Station, then turned around to attempt an unprecedented landing on earth.While the cargo ship flies towards the space station, the rocket was expected to head back to a floating platform in the Atlantic Ocean some 200 miles (322 km) off Jacksonville, Fla., north of the Cape Canaveral Air Force Station launch site. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT TPX IMAGES OF THE DAY SOCIETY) 

The unmanned Falcon 9 rocket launched by SpaceX, on a cargo resupply service mission to the International Space Station, lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. The unmanned Space Exploration Technologies Falcon 9 rocket blasted off from Florida on Saturday carrying a cargo capsule for the International Space Station, then turned around to attempt an unprecedented landing on earth.While the cargo ship flies towards the space station, the rocket was expected to head back to a floating platform in the Atlantic Ocean some 200 miles (322 km) off Jacksonville, Fla., north of the Cape Canaveral Air Force Station launch site. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT SOCIETY) 

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station (ISS), lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. An unmanned Space Exploration Technologies mission blasted off on Saturday carrying cargo for the ISS, but efforts to reland the rocket on a sea platform failed, the firm said. The Dragon cargo capsule itself was successfully launched into space and is expected to dock with the space station on Monday. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT) 

The unmanned Falcon 9 rocket launched by SpaceX, on a cargo resupply service mission to the International Space Station, lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. The unmanned Space Exploration Technologies Falcon 9 rocket blasted off from Florida on Saturday carrying a cargo capsule for the International Space Station, then turned around to attempt an unprecedented landing on earth.While the cargo ship flies towards the space station, the rocket was expected to head back to a floating platform in the Atlantic Ocean some 200 miles (322 km) off Jacksonville, Fla., north of the Cape Canaveral Air Force Station launch site. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT SOCIETY) 

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida, January 10, 2015. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX, on a cargo resupply service mission to the International Space Station, lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. The unmanned Space Exploration Technologies Falcon 9 rocket blasted off from Florida on Saturday carrying a cargo capsule for the International Space Station, then turned around to attempt an unprecedented landing on earth.While the cargo ship flies towards the space station, the rocket was expected to head back to a floating platform in the Atlantic Ocean some 200 miles (322 km) off Jacksonville, Fla., north of the Cape Canaveral Air Force Station launch site. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT SOCIETY) 

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida, January 10, 2015. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida, January 10, 2015. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. REUTERS/Michael Berrigan (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station streaks across the night sky after lifting off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. REUTERS/Michael Berrigan (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX, on a cargo resupply service mission to the International Space Station, is shown in this time exposure as it lifts off from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 10, 2015. The unmanned Space Exploration Technologies Falcon 9 rocket blasted off from Florida on Saturday carrying a cargo capsule for the International Space Station, then turned around to attempt an unprecedented landing on earth.While the cargo ship flies towards the space station, the rocket was expected to head back to a floating platform in the Atlantic Ocean some 200 miles (322 km) off Jacksonville, Fla., north of the Cape Canaveral Air Force Station launch site. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)