Live coverage: Orion lands in Pacific

Fueled segments of the solid rocket boosters that will lift off on the first flight of NASA’s Space Launch System have arrived at the Kennedy Space Center in Florida, but officials will hold off on stacking the boosters until the SLS core stage completes a crucial test-firing later this year.

Astronauts Butch Wilmore and Terry Virts suited up and ventured outside the International Space Station on Sunday on their third spacewalk in eight days to install equipment to help future commercial crew capsules built by Boeing and SpaceX navigate to the complex.

Poor weather in the offshore recovery zone east of Florida forced SpaceX and NASA to delay the departure of an upgraded Cargo Dragon spaceship from International Space Station Monday. The capsule is bringing home several tons of research equipment, specimens, and other equipment.