Photos: EchoStar 19 launch as seen from press site

The mission, dubbed Cert-2 by United Launch Alliance, is the final mission required before the rocket can begin launching national security missions. Liftoff is set for the beginning of a three-hour window at 6 a.m. EDT (1000 UTC).

Rising from the ground and into the launch pad gantry, a clandestine U.S. national security payload was fitted atop its Atlas 5 booster rocket in California today for the ride into space on March 1.

An Indian Polar Satellite Launch Vehicle lifted off at 0427 GMT Thursday (11:27 p.m. EST Wednesday) with 31 satellites from nine countries, with most of the smallsats coming from U.S. customers.