Photos: Atlas 5 rolls out for launch

United Launch Alliance’s first full-scale Vulcan booster with two Blue Origin BE-4 engines arrived at Cape Canaveral Space Force Station on Saturday, the first time in more than a decade that a core stage from a new family of orbital-class rockets has rolled into the Florida launch facility.

Assuming a May 1 launch, the Starliner spacecraft would dock with the ISS on May 2. The spacecraft will launch on the 100th flight of United Launch Alliance’s Atlas 5 rocket.

A replay of the United Launch Alliance Atlas 5 rocket launching the Navy’s Mobile User Objective System communications satellite No. 4 from Cape Canaveral, Florida.