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Bulgarian Soldiers

Bulgarian soldiers conduct a interoperability test during Exercise Combined Endeavor 2006 at Baumholder, Germany, 13 May 2006. Combined Endeavor 2006, a U.S. European Command sponsored multinational exercise representing 41 partner nations, is the largest security cooperation and communications exercise in the world. (U.S. Air Force photo by Master Sgt. David Underwood) (Released)