Icelandic Minister of Foreign Affairs Gunnar Sveinsson watches as U.S. Air Force Tech. Sgt. Joseph Blakely, KC-135 Stratotanker boom operator from RAF Mildenhall, England, offloads fuel during a mission May 27, 2014, near Keflavik International Airport in Iceland. The minister flew on the mission to view first-hand the U.S.-led Icelandic Air Policing mission currently happening there. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)

U.S. Air Force Capt. Mike Gargano, 48th Air Expeditionary Group KC-135 Stratotanker pilot from RAF Mildenhall, England, greets Icelandic Minister of Foreign Affairs Gunnar Sveinsson May 27, 2014, during the minister's visit to Keflavik International Airport in Iceland. The minister visited the airport to view first-hand the U.S. mission of Icelandic Air Policing currently happening there. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)

Icelandic Minister of Foreign Affairs Gunnar Sveinsson speaks with 48th Air Expeditionary Group KC-135 Stratotanker pilots May 27, 2014, during a flight near Keflavik International Airport in Iceland. The minister flew on the mission to view first-hand the U.S.-led Icelandic Air Policing mission currently happening there. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)

An F-15C Eagle flies near a KC-135 Stratotanker after aerial refueling May 27, 2014, near Keflavik International Airport in Iceland. Icelandic Minister of Foreign Affairs Gunnar Sveinsson, his staff, Director General of the Icelandic Coast Guard Georg Larusson and U.S. Embassy Charge d’affaires Paul O’Friel flew on the mission to witness the U.S.-led Icelandic Air Policing mission currently happening there. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)

Director General of the Icelandic Coast Guard Georg Larusson watches as U.S. Air Force Tech. Sgt. Joseph Blakely, KC-135 Stratotanker boom operator from RAF Mildenhall, England, offloads fuel May 27, 2014, during a mission near Keflavik International Airport in Iceland. Larusson flew on the mission to view first-hand the U.S.-led Icelandic Air Policing mission currently happening there. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)

Icelandic Minister of Foreign Affairs Gunnar Sveinsson, his staff, Director General of the Icelandic Coast Guard Georg Larusson and U.S. Embassy Charge d’affaires Paul O’Friel visited Keflavik International Airport and flew on a KC-135 Stratotanker May 27, 2014, to witness the U.S.-led Icelandic Air Policing mission currently happening there. The KC-135 aircraft and crew are home stationed at RAF Mildenhall, England. (U.S. Air Force photo by Tech. Sgt. Benjamin Wilson/Released)