(left to right) US Air Force MASTER Sergeants John P. Snow and Joh Trautt, both assigned to US Air Forces Europe, Visual Information, document the participants of COMBINED ENDEAVOR 2001, during the closing ceremonies. This marks the end of Combined Endeavor in Lager Aulenbach, Germany. Sponsored by US European Command and hosted by Germany, the exercise is held annually to test and document the interoperability of dozens of countires and NATO. This is the largest communications and information systems exercise in the world, 37 countries participated this year