WASHINGTON, March 18 (UPI) -- Washington has given Petrobras America Inc. permission to start oil and gas production in the Gulf of Mexico, a regulator said. The Bureau of Ocean Energy Management, Regulation and Enforcement gave Petrobras approval to use a floating production storage offloading facility at its Cascade-Chinook project in the Gulf of Mexico. The approval marks the first time FPSO technology will be used in U.S. waters of the Gulf of Mexico. The oil and gas project is about 165 miles off the coast of Louisiana in 8,200 feet of water. The FPSO has a production capacity of...