United Launch Alliance’s Atlas 5 rocket lifts off from Cape Canaveral Space Force Station, Florida, to begin the USSF-12 mission for the U.S. Space Force. Credit: United Launch Alliance
A United Launch Alliance Atlas 5 rocket fired off its launch pad at Cape Canaveral Friday on a six-hour climb to geosynchronous orbit, deploying a classified payload and a U.S. Space Force satellite to test an improved infrared heat-sensitive sensor design that could help detect and track enemy hypersonic missiles.