The two structural elements of Orbital ATK’s OA-7 Cygnus space freighter were delivered to Kennedy Space Center for final assembly, the packing of cargo and launch to the International Space Station.

Boeing said Wednesday it has turned down an offer from Aerojet Rocketdyne to buy United Launch Alliance, a Boeing-Lockheed Martin joint venture that operates the Atlas and Delta rocket fleets.

United Launch Alliance’s Atlas 5 rocket, modified for crewed launches, rolled out of the Vertical Integration Facility Wednesday for the 1,800-foot trek to pad 41 in preparation for liftoff with Boeing’s Starliner crew capsule on an unpiloted mission to the International Space Station.