A U.S. Army crew chief from the 160th Special Operations Aviation Regiment (Airborne) checks a landing zone from the ramp of an MH-47G Chinook helicopter during the opening ceremonies of Jackal Stone 10 in Swidwin, Poland, on Sept. 20, 2010. Jackal Stone 10, hosted by Poland and Lithuania, is a special operations exercise designed to enhance capabilities and interoperability among the participating forces and to build mutual respect while sharing doctrinal concepts. The exercise, which was coordinated with U.S. Special Operations Command Europe, included Poland, Lithuania, Latvia, Croatia, Romania and Ukraine.