Space Exploration Technologies wants to be the go-to cargo company of the future. Also known as SpaceX, the company is developing space launch services that it claims could help the Department of Defense save up to $1 billion a year. The company's Dragon spacecraft became the first commercial spacecraft ever to visit NASA's International Space Station (ISS) in mid-2012. Its Falcon family of vehicles includes Falcon 9, which was successfully launched in the same flight to the ISS with the Dragon, and the Falcon Heavy, which can carry twice as much as NASA's former flagship craft, the Space Shuttle.