SpaceX heads for ISS again

SpaceX, the upstart company that presents the first serious challenge in many years to the US medium/heavy launch giants (Boeing and Lockheed Martin), has launched its second Dragon capsule bound for the space station. The first Dragon mission to the ISS was almost perfect. If NASA's experiment in private contracting pans out, private firms will take over "routine" launch of people and cargo to Low Earth Orbit (LEO) and NASA can concentrate on its planetary probes and (hopefully) astronaut missions beyond LEO.