Stats: Delta 4 history and backlog (updated March 30)

On the eve of its scheduled flight for U.S. national security interests, the United Launch Alliance Delta 4-Heavy rocket stands quietly inside the protective gantry at Cape Canaveral’s Complex 37 pad.

Nearly a decade after Orbcomm raised the money to pay for a second-generation satellite fleet to drastically expand the company’s reach, the $230 million program is finally primed for completion after Monday’s launch of a Falcon 9 rocket from Cape Canaveral.

For the second time this week, United Launch Alliance has delivered an Air Force payload to one of its Cape Canaveral pads for liftoff in July.