Photos: Delta 4 lights up the sky for night owl launch

Astronauts Doug Hurley and Bob Behnken donned their SpaceX-made launch and entry flight suits Saturday and rode to pad 39A at the Kennedy Space Center in a final dress rehearsal before launch day.

This is our comprehensive fact sheet previewing the United Launch Alliance Atlas 5 rocket deployment of the classified NROL-42 payload for the National Reconnaissance Office.

Watch a replay of SpaceX’s Falcon 9 rocket taking off from pad 39A at NASA’s Kennedy Space Center with the BulgariaSat 1 communications satellite, as viewed from the press viewing site around three miles away.