MUOS-1 attached to Atlas 5
Launch

U.S. Air Force Outlines First Steps in RD-180 Replacement Effort

Facing congressional pressure to begin work on an American replacement for the Russian-built main rocket engine used today to launch most U.S. national security payloads, the U.S. Air Force quietly unveiled the initial steps in a procurement strategy that has been complicated by a key industry player’s own plans.