Video: Atlas 5 rocket launches space station cargo mission

Final preparations began this weekend at NASA’s Stennis Space Center in Mississippi to load super-cold liquid hydrogen and liquid oxygen into the massive core stage of the Space Launch System heavy-lift rocket for the first time as soon as Monday.

A United Launch Alliance Atlas 5 rocket launched from Cape Canaveral with a classified payload for the National Reconnaissance Office at 5:32 p.m. EST (2232 GMT) Friday. The launcher debuted new Northrop Grumman-built solid rocket boosters.

A United Launch Alliance Delta 4-Heavy rocket is awaiting liftoff with a classified U.S. government spy satellite at Vandenberg Air Force Base’s historic Space Launch Complex-6, a picturesque rocket facility that was once intended to support launches of military astronauts and space shuttles.