Live coverage: Atlas 5 launches from Cape Canaveral with missile warning satellite

Live coverage of the countdown and launch of an Atlas 5 rocket with the U.S. Air Force’s SBIRS GEO Flight 4 missile warning satellite. Text updates will appear automatically below. Follow us on Twitter.

 Launch Alliance’s live video webcast of the Atlas 5 launch will begin at 7:28 p.m. EST on Jan. 19 (0028 GMT on Jan. 20).