The first two Vulcan test flights last year used a configuration of the rocket with two strap-on boosters to add an extra burst of speed off the launch pad. For this flight, which the Space Force has named USSF-106, the launcher will fly with four solid rocket boosters made by Northrop Grumman.

The United Launch Alliance 's Vulcan rocket will send the first U.S. national security mission to space on Tuesday night, sending satellites up. It's part of the United States Space Force (USSF)-106 mission. Liftoff will occur from Space Launch Complex-41 at Cape Canaveral Space Force Station on Florida's Space Coast.