The U.S. Air Force announced on Monday that it intends to build two landing pads on a remote island in the Pacific. It wants to land rockets there as part of a test of the Rocket Cargo Vanguard program, which involves shooting rockets into space loaded down with supplies to ship stuff around the planet faster.

Vulcan’s certification means SpaceX should have at least one competitor for future launches — though several other firms are lining up behind them.

United Launch Alliance on Wednesday had its new Vulcan rocket certified by the Space Force so it can begin flying national security missions.