Atlas 5 navigates its way to successful GPS launch

An Atlas 5 rocket successfully powered a replacement Global Positioning System satellite into space Wednesday to bolster the navigation utility for military and civil users around the world. The 737,000-pound, two-stage rocket, loaded with kerosene fuel, liquid oxygen and liquid hydrogen, roared to life at 5:38 p.m. EDT (2138 GMT) to launch the GPS 2F-4 spacecraft, continuing a string of on-time launches of all four Atlas rocket flights so this year. More

(Source: Spaceflight Now - May 16)