Live coverage: Delta 2 launches

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.

NASA astronauts Doug Hurley and Bob Behnken returned to Earth Sunday with an on-target splashdown in the Gulf of Mexico at 2:48 p.m. EDT (1848 GMT) Sunday. The astronauts completed a two-month stay on the International Space Station on a test flight of SpaceX’s Crew Dragon spacecraft.

NASA’s InSight spacecraft, the next lander to head for Mars, lifted off Saturday from Vandenberg Air Force Base in California aboard a United Launch Alliance Atlas 5 rocket. Launch occurred in a blanket of fog at 4:05 a.m. PDT (7:05 a.m. EDT; 1105 GMT).