A F-22 Raptor fighter jet of the 95th Fighter Squadron from Tyndall, Florida, is being refuelled over the Baltic Sea by a KC-135 Stratotanker from the 100th Air Refueling Wing from the Royal Air Force Base in Mildenhall, Britain on its way towards the newly established NATO airbase of Aemari, Estonia September 4, 2015. Four F-22 Raptors and some 60 airmen were deployed to Spangdahlem Air Base, western Germany, to train with allied air forces such as Poland and Estonia. The first-ever training deployment of the 5th fighter generation to Europe is part of the European Reassurance Initiative. REUTERS/Wolfgang Rattay