The most powerful version of the Atlas V available launched tonight, January 21st 2015 at 10:18 UTC from Space Launch Complex 41 at Cape Canaveral in Florida. The nearly 63 meter tall rocket with Russian powered RD 180 engine and five solid rocket motors boosted the Mobile User Objective System 4 (MUOS-4) satellite into orbit for the US Navy. MUOS provides vital communications and connectivity to armed forces around the globe.