On April 10, 2016 at 13:57 UTC the private U.S. unmanned supply spacecraft, the "Dragon” SpX-8 (CRS-8 flight), was successfully docked to the International Space Station. The linkup operation was carried out with the help of the giant 17-meter Canadarm. The capture with Canadarm-2 was performed by British astronaut Timothy Peake at 11:23 UTC. The Dragon spacecraft was maneuvered into position and attached to a berthing port on the space station's Harmony module. The centerpiece of Dragon’s 3.5-ton cargo load is the Bigelow Expandable Activity Module, or BEAM, a pathfinder for future inflatable habitats that could form commercial space stations, ferry astronauts to deep space destinations, and even protect explorers on the surface of Mars. The 1,413-kilogram BEAM structure rode to the space station inside the Dragon spacecraft’s unpressurized trunk section. Now in total, six spacecraft are in port at the space station, including the two U.S. commercial supply ships, two Soyuz crew transport craft, and two Russian Progress unmanned supply spacecraft.