Unprecedented fourth launch in four months for Atlas 5

Launching. Just launching. That's been the mantra for the United Launch Alliance Atlas 5 rocket program, which successfully completed its fourth flight in four months on Tuesday by boosting a surveillance satellite into orbit for the Pentagon. The pace is the unprecedented in the decade-long history of the Atlas 5 family, and each of the four missions lifted off in the opening moment of their launch windows on the first attempt. More

(Source: SpaceFlight Now - Mar 20)