FILE - The main entrance for the U.S. Army Patch Barracks in Stuttgart, Germany, Nov. 28, 2006, where the headquarters of the U.S. European Command (EUCOM) is located. The U.S, military has raised the security protection measures it is taking at its bases throughout Europe, asking service members to be more vigilant and keep a lower profile due to a combination of threats it's seeing across the region. (AP Photo/Thomas Kienzle, File)