UPDATE: SpaceX says it will not attempt to launch SES-8 today. The next launch attempt will be no earlier than 5:38pm ET on Thursday.
WATCH LIVE IN THE VIDEO BOX BELOW: Mobile users: http://bit.ly/1dwDybd
SpaceX says it will launch a SES-8 telecommunications satellite aboard a Falcon 9 rocket Monday evening.
Liftoff will take place from Cape Canaveral.
According to SpaceX, the satellite will be the company's first launch to a geostationary transfer orbit and its most challenging mission to date.
SpaceX says the launch window opens at 5:37 p.m. eastern time.
Watch the launch live at www.spacex.com/webcast .