JOINT BASE ELMENDORF-RICHARDSON, Alaska -- Alaska Air National Guard Col. Joshua Armstrong succeeds Col. Matthew Calabro as the 176th Operations Group commander during a July 14, 2022, ceremony at Joint Base Elmendorf-Richardson. The 176th OG carries out the missions of strategic airlift, tactical airlift, air defense, and combat search and rescue. (Alaska Air National Guard photo by Staff Sgt. Daniel Robles)