From April 11th to 22nd about 70 aircraft from nine countries – Belgium, Finland, France, Germany, Great Britain, Norway, Poland, The Netherlands, United States, participated in Frisian Flag, being the largest air-to-air and air-to-ground multinational NATO exercise in Western Europe this year. The exercise takes place annually and is host by the Royal Netherlands Air Force at its Leeuwarden AB close to the North Sea. See our images and read the review on the Best Aviation Website: !