Hellenic Air Force Col. Evangelos Tzikas (left) walks U.S. Air Force Maj. Gen. Greg Semmel (right) into the newly formed Integrated Air and Missile Defense Center of Excellence for a facility tour in Chania, Crete, April 21, 2021. The IAMD COE was recently approved as a multinational COE where subject matter experts from five nations collaborate thoughts and inputs for the IAMD domain. (U.S. Air Force courtesy photo)