U.S. government officials declined to describe the specific sites that have drawn interest, or to discuss how they were identified. However, the United States and other Western governments have long been interested in identifying possible locations for a facility in Syria that might have supplied nuclear fuel rods for a Syrian reactor. Although the Al Kibar site was described as nearly operational at the time of the Sept. 6 bombing, it had no clear source of the uranium fuel necessary for operation, according to U.S. intelligence officials and diplomats familiar with the site.