Live coverage: International crew launches from Kazakhstan

An Ariane 5 countdown in French Guiana was aborted Tuesday with the European-made rocket’s main engine already running, postponing the launch of two commercial communications satellites until engineers can resolve the problem.

With his year in orbit at an end, Expedition 46 commander Scott Kelly hands command of the International Space Station to Expedition 47 commander Tim Kopra.

Ground controllers powered up the International Space Station’s robotic arm and repositioned a storage module Wednesday to give visiting cargo delivery vehicles a second parking port at the complex.