Israeli soldiers prepare for a visit from Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey in Tel Aviv, Israel, Oct. 29, 2012, during Austere Challenge 2012. Austere Challenge 2012 is a three-week bilateral exercise designed to increase air defense interoperability between the United States and Israel. (U.S. Air Force photo by Maj. Stephanie Addison/Released)