Watch the Falcon 9 launch from pad 39A

The U.S. Space Force’s Space Systems Command (SSC) and the Space Operations Command (SpOC) shifted the GPS 3 Space Vehicle 07 spacecraft to a SpaceX Falcon 9 rocket from a United Launch Alliance Vulcan rocket due to delays in Vulcan’s certification.

Lawmakers last week questioned the Trump administration’s proposal to end direct U.S. government support of the International Space Station in 2025, citing concerns about the economic viability of commercial outposts in low Earth orbit.

A four-man crew led by a former NASA astronaut intends to blast off early next year aboard a SpaceX Crew Dragon capsule for a flight to the International Space Station, the first such purely commercial, non-government flight to orbit in space history, officials said Tuesday.