Ukranian Special Forces exit a U.S. Army MH-47G Chinook helicopter during a rehearsal for the opening exercise of Jackal Stone 10 in Poland, Sept. 19, 2010. Jackal Stone 10, hosted by Poland and Lithuania, is an annual international special operations forces exercise held in Europe and coordinated with U.S. Special Operations Command Europe. U.S. Army photo by Sgt. 1st Class Jason Cauley