Live coverage: 400th Proton rocket takes off with Russian satellite

The U.S. Air Force’s fourth new-generation SBIRS missile warning satellite is headed for geosynchronous orbit after lifting off from Cape Canaveral at 7:48 p.m. EST Friday (0048 GMT Saturday), after a one-day delay caused by a troublesome fill-and-drain valve.

The Russian Soyuz MS-03 spacecraft and booster rocket were rolled out to the launch pad at the Baikonur Cosmodrome on Monday in preparation for liftoff Thursday at 3:20 p.m. EST (2020 GMT) on a two-day trek to the International Space Station.

Flying for the first time this year, a Proton rocket streaked into space Thursday from the Baikonur Cosmodrome in Kazakhstan with two Russian Express communications satellites that will beam television, radio and broadband signals across the country.