Four F-16C Fighting Falcon aircraft fly in formation over Keflavik Air Base, Iceland, July 25, 2019. The 480th Fighter Squadron, 52nd Fighter Wing, are in Iceland to conduct an air surveillance mission in support of NATO alliance commitments.The focus of Icelandic Air Surveillance 2019 is to establish air surveillance and interception coverage over Iceland in order to maintain the integrity of the NATO airspace. (U.S. Air Force photo by Airman 1st Class Jovante Johnson)