GEN George A. Joulwan (USA), Supreme Allied Commander Europe (SACEUR), looks on as Secretary of Defense William Perry greets GEN William W. Crouch (USA), Commander Allied Land Forces Central Europe, during the ceremonies honoring Secretary Perry's arrival at Tuzla Air Base, Bosnia-Herzegovina, during Operation Joint Endeavor. Operation Joint Endeavor is a peacekeeping effort by a multinational Implementation Force (IFOR), comprised of NATO and non-NATO military forces, deployed to Bosnia in support of the Dayton Peace Accords