ULA's Vulcan is replacing the company's workhorse Atlas 5 rocket and the already-retired Delta 4 family of launchers.

The Vulcan, the United Launch Alliance's newer rocket, got off the ground from Florida on its first national security mission for US Space Force.

United Launch Alliance completed its first US national security mission with the newly developed Vulcan rocket, a key test of the vehicle’s ability to put satellites into high orbits above the Earth.