Photos: Atlas 5 rolls out for launch

The Russian Soyuz MS-02 spacecraft and booster rocket were rolled out to the launch pad at the Baikonur Cosmodrome on Sunday in preparation for liftoff Wednesday on a two-day trek to the International Space Station.

The top secret intelligence-gathering payload for the U.S. government set for launch Tuesday on top of a Delta 4-Heavy rocket is likely the next in a line of sensitive eavesdropping satellites designed to intercept radio signals and other communications traffic from adversaries around the world.

The maker of inflatable technology for a commercial space station will use a top-of-the-line Atlas 5 rocket with a stretched nose cone to hoist the first habitat into Earth orbit in 2020.