Photos: Atlas 5 launches EchoStar 19 broadband satellite

Elements of the next U.S. commercial cargo-delivery trip to the International Space Station are coming together at Kennedy Space Center for the planned March 10 liftoff.

Riding the rails to the launch pad Wednesday morning, the Atlas 5 rocket was rolled out to Cape Canaveral’s Complex 41 for liftoff Thursday night to deploy four NASA satellites that will probe Earth’s magnetosphere for a high-priority research project.

SpaceX’s new Falcon Heavy rocket successfully soared into orbit Tuesday, and its two strap-on boosters came back to Cape Canaveral for an electrifying double-landing punctuated by quadruple sonic booms.