Hurricane Isaac
Dr. Rick Knabb, center, director of the National Hurricane Center, Stacy Stewart, right, senior hurricane specialist, and James Franklin, chief hurricane specialist, track Tropical Storm Isaac at the National Hurricane Center in Miami, Monday, Aug. 2, 2012. Tropical Storm Isaac targeted a broad swath of the Gulf Coast on Monday and had New Orleans in its crosshairs, bearing down just ahead of the seventh anniversary of Hurricane Katrina. (AP Photo/Alan Diaz)