Live coverage: SpaceX to launch classified payload for the U.S. Space Force

The mission, dubbed USSF-153 mission, will launch an undisclosed number of satellites for the U.S. Space Force. Liftoff from pad 4E at Vandenberg Space Force Base is scheduled during a three-hour window that opens at 8:37 a.m. PDT (1137 a.m. EDT / 1537 UTC).