U.S. Navy Rear Adm. John Messerschmidt, Director of Assessments and Analysis, U.S. European Command, inspects the Navy MAST tent set up during Combined Endeavor (CE) 2012 Distinguished Visitors Day, Joint Multinational Training Command, Grafenwoehr, Germany, Sept. 13, 2012. CE12 is a multinational command, control, communications and computer systems exercise designed to build and enhance communications and network interoperability between 41 nations and international organizations.