"It's enough to knock you down."

PENSACOLA BEACH, Fla. A Florida beach was closed to visitors for the first time because of the Gulf oil spill Thursday as workers tried to remove pools of black sludge from Pensacola Beach's once-white sands. Lifeguard Collin Cobia wore a red handkerchief over his nose and mouth to block the oil smell. "It's just awful, he said." It just breaks your heart. I can't get my feet in the water."