European air force bases that store U.S. nuclear bombs are failing to meet basic security requirements to safeguard the weapons, according to a report obtained under the Freedom of Information Act.

　　The U.S. keeps an estimated 350 thermonuclear bombs in six NATO countries. In four of those — Belgium, Germany, Italy and the Netherlands — the weapons are stored at the host nation's air bases, where they are guarded by specially trained U.S. military personnel.

　　But according to an internal U.S. Air Force report, the sites are falling short of Department of Defense requirements, with fencing and security systems in need of repair, thin rotations that often lead to staffing shortages, and responsibilities falling to inadequately trained foreign security personnel.