Photos: Tuesday’s Atlas 5 rollout

Boeing engineers are close to resolving concerns with the mass and aerodynamic shape of the company’s CST-100 Starliner commercial crew carrier, and officials are optimistic the spaceship will be ready to deliver astronauts to the International Space Station in early 2018.

Launch teams are readying three rockets for a series of blastoffs this week from Cape Canaveral to loft a classified orbiting spy platform for the U.S. government, a long-delayed Argentine radar imaging payload, and the next set of Starlink broadband satellites.

Boeing’s Starliner spacecraft parachuted to an airbag-cushioned landing in New Mexico on Dec. 22 to conclude an abbreviated two-day test orbital test flight that accomplished many objectives, but missed a planned rendezvous and docking with the International Space Station.