NASSAU, Bahamas — Rescuers spotted floating debris and an oil sheen Sunday as U.S. crews continued an intensive search off the southeastern Bahamas for a U.S. cargo ship with 33 people on board. By Sunday, the U.S. Coast Guard said its aircrews spotted “life jackets, life rings, containers and an oil sheen” in the sprawling search area but they have not yet been able to confirm whether the debris and oil is from the El Faro. U.S.