Aviation Ordnanceman Airman Jason Leindecker checks headspace and timing on an M2HB .50-caliber machine gun prior to a live-fire exercise aboard the Nimitz-class aircraft carrier USS Carl Vinson. Carl Vinson is deployed in the U.S. 5th Fleet area of operations supporting Operation Inherent Resolve, strike operations in Iraq and Syria as directed, maritime security operations, and theater security cooperation efforts in the region.