[Launch Alert] Launch Tonight

[Launch Alert]

The following is an update from SpaceX:

"SpaceX is targeting Thursday, March 20 for a Falcon 9 launch of the NROL-57 mission from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California. Liftoff is targeted for 11:49 p.m. PT. If needed, a backup opportunity is available on Friday, March 21 starting at 11:31 p.m. PT.

About eight minutes after liftoff, Falcon 9's first stage will land on SpaceX's Landing Zone 4 (LZ-4) at Vandenberg Space Force Base, California. There is the possibility that residents of and visitors to Santa Barbara, San Luis Obispo, and Ventura counties may hear one or more sonic booms during the landing, but what residents experience will depend on weather and other conditions.

SpaceX's webcast will go live approximately 10 minutes before Falcon 9's liftoff at spacex.com/launches."

For countdown status and video feeds of the launch, go to:

https://spaceflightnow.com

https://www.spacex.com/launches/mission/?missionId=nrol-57

https://twitter.com/SpaceX

This information is subject to change.