WATCH LIVE TONIGHT! Air Force Launching Missile-Detecting Satellite @ 7:46 pm ET

The U.S. Air Force's SBIRS Geo-3 satellite is scheduled to launch atop a United Launch Alliance (ULA) Atlas V rocket today (Jan. 19) at 7:46 p.m. EST (0046 GMT on Jan. 20). Watch the liftoff live in the window below, beginning at 7 p.m. EST (0000 GMT), courtesy of ULA: