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

Two satellites designed to beam radio and television broadcasts, Internet connectivity and other communications services across Russia have arrived at a launch pad at the Baikonur Cosmodrome in Kazakhstan for liftoff Thursday on the first flight of a Russian Proton rocket this year.

The launch of the seventh Wideband Global SATCOM military communications satellite aboard a Delta 4 rocket booster occurred tonight at 8:07 p.m. EDT (0007 GMT) from Cape Canaveral.

After calling a hold less than a minute before liftoff Friday, SpaceX launched the Maxar-built SXM 7 radio broadcasting satellite for SiriusXM Sunday. A Falcon 9 rocket lifted off from pad 40 at Cape Canaveral at 12:30 p.m. EST (1730 GMT).