California's SpaceX has launched on a mission to re-supply the space station - the first cargo delivery to the orbiting outpost by a private company.
The firm's Falcon rocket, topped by an unmanned Dragon freight capsule, lifted clear of its Florida pad at 03:44 EDT (07:44 GMT; 08:44 BST).
The initial climb to an altitude some 340km above the Earth lasted a little under 10 minutes.
Within moments of being ejected, Dragon opened its solar panels.
It will take a couple of days to reach the station. The plan currently is for the vessel to demonstrate its guidance, control and communications systems on Thursday, at a distance of 2.5km from the International Space Station (ISS).
Success! Thus, begins a new phase in US space flight. Note that once more the US government has nursemaided a technology to the point where the private sector can begin to make a profit from it.
At right is a photo of the launch of the SpaceX Falcon Rocket this morning.