Airman 1st Class Casey Pritchard assembles a section of the experimental AquaFence flood protection barrier.
U.S. Air Force Airman 1st Class Casey Pritchard, with the 119th Civil Engineer Squadron, North Dakota Air National Guard, assembles a section of the experimental AquaFence flood protection barrier in Fargo, N.D., on March 17, 2010. The fence is being installed to see if it can be an effective flood barrier.