U.S. airmen spread sheets of plastic over reinforced levees. U.S. airmen assigned to the Illinois Air National Guard spread sheets of plastic over reinforced levees along the Mississippi River near Pleasant Hill, Ill., on June 19, 2008. Members of the Illinois Air and Army National Guard are assisting state and local agencies in flood relief efforts in the area. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 188612-M-UPA70-311.jpg Photo Gallery