Aircraft from multiple countries participating in INIOCHOS 21 fly in formation over Greece, April 22, 2021. The Hellenic air force-lead INIOCHOS 21 is a multinational exercise designed to enhance the interoperability and skills of allied and partner air forces. The exercise assists in the accomplishment of future joint operations and air defenses, maintaining joint readiness and reassuring regional allies and partners. (U.S. Air Force photo by Airman 1st Class Thomas S. Keisler IV)