Space.com: Watch a huge Delta IV Heavy rocket launch a US spy satellite on its final West Coast flight live today

"We're on track to launch another national capability into space. This will be our sixth national security launch this year. We've worked alongside ULA to prepare this Delta IV Heavy, and in just a few days, we will see the fruits of our labor," Brig. Gen. Stephen Purdy, Space Force program executive officer for assured access to space, said in an emailed statement Thursday (Sept. 22).