U.S. Air Force Senior Airman Nick J. Barth, an aircraft loadmaster with the 169th Airlift Squadron, packs a training bundle on a C-130 Hercules at Alpena, Mich., in support of Exercise Northern Strike 2013 on Aug. 7, 2013. Exercise Northern Strike 2013 is a joint multi-national combined arms training exercise conducted in northern Michigan. (U.S. Air National Guard photo by Master Sgt. Scott Thompson/released)