The final Delta 4 Medium rocket lifts off from Cape Canaveral Air Force Station on August 22, 2019, carrying into orbit the U.S. Air Force’s GPS 3 SV02 navigation satellite.

United Launch Alliance vows a “seamless” switch from the Atlas 5 to the new Vulcan rocket in launches of Boeing’s astronaut taxis.

The United Launch Alliance Atlas 5 rocket, standing 197 feet tall and and weighing 1.2 million pounds, unleashes 2.4 million pounds of thrust from its main engine and four solid-fuel boosters at 6:42 p.m. EST (2342 GMT) Saturday to launch the GOES-R weather observer for NASA and NOAA from Cape Canaveral, Florida.