Isaac poised for Gulf landfall on Katrina anniversary

NEW ORLEANS (CNN) -- Tropical Storm Isaac neared hurricane strength Monday evening, closing on the Gulf Coast with a projected landfall on the anniversary of the devastating Hurricane Katrina.

Florida, the Caribbean brace for Tropical Storm Isaac

(CNN) -- Not yet a hurricane, Tropical Storm Isaac has already delivered shock waves from the Caribbean to Florida, postponing terror trial hearings in Cuba and posing a potential threat to next week's GOP convention in Tampa.