Live coverage: Kennedy Space Center to reopen Friday

The Air Force’s robotic X-37B mini space shuttle swooped out of obscurity today after 718 days spent in orbit on a secretive military mission, touching down at the Kennedy Space Center’s orbiter runway on autopilot, the military announced on Twitter.

The twin 177-foot-tall solid-fueled boosters for the first flight of NASA’s Space Launch System have been stacked inside the Vehicle Assembly Building at the Kennedy Space Center to await arrival of the rocket’s cryogenic core stage, which is set for a second engine test on a firing stand in Mississippi later this month.

The Sunday evening launch was the first of two in a period of just over five hours. Liftoff from Cape Canaveral Space Force Station took place at 7:05 p.m. EDT (2305 UTC).