Live from Vandenberg Space Force Base in California on Thursday, September 10, as SpaceX launches the 'classified' USSF-153 mission for the US Space Force.

The Falcon 9 rocket is scheduled to lift off from Space Launch Complex 4E, carrying an undisclosed payload into low Earth orbit. Details of the government mission remain under wraps.

The Falcon 9's first-stage booster is flying for the 27th time and is expected to attempt a landing on SpaceX's 'Of Course I Still Love You' droneship in the Pacific Ocean.