americaspace.com
ULA Atlas-V Propels MUOS-4 Satellite Into Space, Air Force and Congress Shudder Over Threats to Russian RD-180
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 tran…