Danish Sergeant First Class (SFC) Per Rasmussen runs a test on the interconnectivity of his system with others participating in the Combined Endeavor exercise at Lager Aulenbach, Germany (DEU). Combined Endeavor 2004, is a US European Command-sponsored exercise, designed to identify and document command, control, communications, and computer (C4) interoperability between North Atlantic Treaty Organization (NATO) and Partnership for Peace nations