A new infrared reconnaissance satellite for one of the United States’ highest priority space programs — making early detection of enemy missile launches — was successfully delivered into orbit Friday by an Atlas 5 rocket.

A Proton rocket blasted off from the Baikonur Cosmodrome in Kazakhstan at 2040 GMT (4:40 p.m. EDT) Friday with Turkey’s Turksat 4B communications satellite.

The United Launch Alliance Atlas 5 rocket stands poised for flight with the Air Force’s X-37B spaceplane and a batch of CubeSats including the LightSail. The rocket was rolled to Complex 41 on Tuesday in preparation for launch on Wednesday.