United Launch Alliance's new Vulcan Centaur rocket just launched on its second-ever mission, a key test flight that keeps it on track for certification by the U.S. Space Force.

United Launch Alliance's Vulcan rocket, under contract for dozens of flights for the US military and Amazon's Kuiper broadband network, lifted off from Florida on its second test flight Friday, suffered an anomaly with one of its strap-on boosters,

The rocket company, jointly owned by Boeing and Lockheed Martin, has been racing to prepare its vehicle to carry military satellites.