ULA Atlas-V Propells MUOS-4 Satellite Into Space as Air Force and Congress Shudder Over Threats To Russian RD-180

A ULA Atlas-V 551 rocket launches the Navy’s MUOS-4 satellite to orbit from Cape Canaveral, Fla. Sep. 2, 2015. Photo Credit: John Studwell / AmericaSpace

A Russian RD-180 powered United Launch Alliance (ULA) Atlas-V 551 rocket successfully launched the 7.5 ton Lockheed Martin/Navy Mobile User Objective System (MUOS 4) satcom into geosynchronous transfer orbit [...]