A United Launch Alliance Delta IV Heavy launches with a National Reconnaissance Office payload at Space Launch Complex-6 at 1:10 p.m. PST. The Delta IV Heavy is the largest rocket ever launched from the west coast of the U.S. standing 235 feet tall and producing nearly two million pounds of thrust at liftoff. The Delta IV Heavy is America’s most powerful liquid-fueled rocket. This was the fifth launch of a Delta IV heavy in program history.