An anonymous reader writes "Two emerging space companies have won a NASA competition to provide low cost commercial transport to the International Space Station. SpaceX, founded by Elon Musk, is developing its two-stage reusable Falcon 9 launch vehicle and Dragon spacecraft, but it is making changes after the loss of Falcon 1 during its maiden launch. Rocketplane Kistler's K-1 is a two-stage reusable launch vehicle that has been in development for over a decade. Both companies represent a departure from business as usual at NASA. Boeing and Lockheed Martin are the largest companies in the aerospace industry and win most NASA contracts."