Soldiers of the 1st Battalion, 119th Field Artillery Regiment, prepare an M-177 155mm howitzer to be sling loaded by a CH-47 Chinook during cold weather operations at Camp Grayling Joint Maneuver Training Center, Mich., Feb 28, 2014. The operation, conducted in sub-zero temperatures, consisted of transporting 12 Howitzers by Chinook to an artillery range to conduct live fire exercises. (Photo by Michigan National Guard Spc. Alexandria Robinson/Released)