Louisiana Army National Guardsmen pause to meet Republican presidential nominee Mitt Romney, not shown, while preparing to distribute food and water to residents in Lafitte, La., Aug. 31, 2012, after Hurricane Isaac struck the region. Isaac developed as a tropical storm over the Western Atlantic Ocean Aug. 21, 2012, affecting Puerto Rico, the Dominican Republic, Haiti and Cuba before making landfall as a hurricane on the Gulf Coast of the United States. (U.S. Air Force photo by Master Sgt. Toby M. Valadie/Released)