Senior Master Sgt. Scott Wagner, of the 119th Civil Engineer Squadron, drills a hole in pavement to secure an experimental AquaFence in place March 17 in Fargo, N.D. The AquaFence is being installed by the North Dakota Air National Guard for the City of Fargo as a test flood barrier to see if it might be effective for use in future flood protection. (DoD photo by Senior Master Sgt. David H. Lipp) (Released)