United Launch Alliance is giving members of the public a behind-the-scenes look during one of its Atlas 5 rocket flights from Cape Canaveral.

The 330-foot tall mobile service tower is rolled away from the United Launch Alliance Delta 4 rocket at Cape Canaveral’s pad 37B in the hours before the scheduled liftoff on Dec. 7 at 6:53 p.m. EST (2353 GMT).

Two Russian cosmonauts and a NASA astronaut flying to the International Space Station for a fourth time lifted off Friday at 2126 GMT (5:26 p.m. EDT) from the Baikonur Cosmodrome in Kazakhstan. The trio reached the orbiting research complex less than six hours later at 0309 GMT (11:09 p.m. EDT).