Photos: Tuesday’s Atlas 5 rollout

United Launch Alliance and Boeing teams worked through the weekend on closeouts of the Starliner crew capsule, inspections and final outfitting of the Atlas 5 rocket. A launch readiness review Tuesday approved the continuation of final preparations for liftoff from Cape Canaveral Friday of the first Starliner spacecraft on an unpiloted test flight to the International Space Station.

Boeing is touting a lunar lander concept that the company claims could launch in one piece on an upgraded version of NASA’s Space Launch System heavy-lift rocket — which Boeing largely builds — and deliver astronauts to the moon’s surface in 2024 without going through NASA’s planned Gateway mini-space station.

SpaceX’s Falcon 9 rocket is awaiting liftoff from Cape Canaveral’s Complex 40 launch pad as soon as Tuesday after three scrubs caused by propellant loading problems and a boat that strayed into restricted waters in the Atlantic Ocean.