General Abidin Ünal, commander of the Turkish Air Force, is presented a memento by Air Force District of Washington Commander Maj. Gen. Darryl Burke while visiting the Tomb of the Unknown Soldier for a wreath laying ceremony at Arlington National Cemetery on Apr. 4, 2016. Distinguished visitors commonly pay formal respects to the sacrifice of America's veterans in foreign wars by placing a wreath before the Tomb. The Air Force District of Washington brings air, space and cyberspace capabilities to the joint team protecting the nation's capital, and supports local personnel and those serving worldwide. (USAF Photo/ Andy Morataya)