Tobias Fella is policy advisor for German and European foreign, security and defense policy at the International Policy Analysis Department at the Friedrich-Ebert-Stiftung (FES) in Berlin.

Special Thanks go to Sarah Leitsmann for her support.

Image: The head-up display of a F-22 Raptor fighter jet reflects the sun light as a pilot of the 95th Fighter Squadron from Tyndall, Florida is seen during refuelling by a KC-135 Stratotanker from the 100th Air Refueling Wing at the Royal Air Force Base in Mildenhall in Britain as they fly over the Baltic Sea towards Spangdahlem airbase, Germany 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 TPX IMAGES OF THE DAY