12 AVIANO AIR BASE, Italy – In support of Astral Knight 2021 (AK21), a joint multinational exercise involving six different countries and approximately 1,900 combined joint forces, two 606th Air Control Squadron (ACS) teams are operating out of forward-deployed locations in Slovenia and Croatia. At Aviano, the 606th ACS is on active standby to provide backup air control for the forward-deployed locations. “Communication during any exercise is important, starting with the initial planning phase and continuing until after actions are documented,” said U.S. Air Force 1st Lt. Chris Colgrove, 606th ACS flight commander of network operations and site lead for the deployed radar.