Federal agents carried out coordinated raids on four Southern California museums and a Los Angeles art gallery early today, the first public move in a five-year investigation of an alleged smuggling pipeline that authorities say funneled looted Southeast Asian and Native American artifacts into local museums. Shortly after 7:30 a.m., search warrants were served on the Los Angeles County Museum of Art, Pasadena's Pacific Asia Museum, the Bowers Museum in Santa Ana and the Mingei International Museum in San Diego. The warrants gave agents broad authority to search the museums' galleries, offices, storage areas and computer archives for objects and...