Live coverage: Two satellites lift off aboard Ariane 5

Russian and European teams at the Guiana Space Center in South America plan to detach a UAE spy satellite from its Soyuz launcher to replace the rocket’s Fregat upper stage, forcing a likely delay until April from the mission’s original launch date of Friday.

A U.S. Army veteran of Operation Desert Storm, a Russian Air Force MiG-29 fighter pilot, and a former flight controller for Russia’s Mir space station arrived at the International Space Station on Friday, with a smooth docking aboard a Soyuz spaceship at 0952 GMT (5:52 a.m. EDT), two days after a successful launch from Kazakhstan.

United Launch Alliance’s 50th mission for the U.S. Air Force lifted off at 12:15 a.m. EDT (0415 GMT) Wednesday. An Atlas 5 rocket launched from Cape Canaveral with the Air Force’s fourth Advanced Extremely High Frequency communications satellite.