Photos: Most powerful Atlas 5 puts 15,000-pound satellite in orbit

United Launch Alliance is set to try again to launch a Delta 4-Heavy rocket and a classified U.S. government spy satellite Thursday after delays of more than three months caused by persistent issues with the mission’s launch pad.

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).

Mission managers will be closely monitoring the weather for the first launch of astronauts aboard SpaceX’s Crew Dragon spacecraft, not just around the Kennedy Space Center, but along a corridor stretching thousands of miles across the Atlantic Ocean in case the crew capsule has to escape from its Falcon 9 rocket during the climb into orbit.