Traveling about 259 miles over China, the unpiloted Russian Progress 73 cargo ship docked at 11:29 a.m. EDT, Jul. 31st to the Pirs docking compartment on the Russian segment of the International Space Station. In addition to the arrival of Progress, the six crewmembers aboard the space station welcomed SpaceX’s cargo Dragon spacecraft on July 27, two days after launching on a Falcon 9 rocket from Launch Complex 40 on Cape Canaveral Air Force Station in Florida.