Levee Building An Army National Guard crew builds a levee across a portion of the beach on Elmer's Island, just west of Grand Isle, La., to prevent oil from the Deepwater Horizon/BP oil spill from reaching sensitive wetlands, May 21, 2010. SHARE IMAGE: Download Image: Full Size (1.86 MB) Photo By: Coast Guard Petty Officer 3rd Class Patrick Kelley VIRIN: 100521-G-ZX620-007.JPG Photo Gallery