Nuclear weapons production and storage sites are guarded by security forces supervised by the Department of Energy. John Gordon, the administrator of the Department of Energy’s National Nuclear Security Administration, has called such sites “one of the last places a terrorist would think about attacking and having hopes of success; the security basically bristles.” But a watchdog organization, the Project on Government Oversight (POGO), charged that security at U.S. nuclear weapons complexes was inadequate and that hundreds of tons of weapons-grade plutonium and highly enriched uranium could be stolen, sabotaged, or even detonated. The Department of Energy dismisses such criticism, adding that security has been stepped up since September 11. Experts note that a terrorist looking to steal nuclear weapons or weapons-grade material would have a much easier time in Russia or Pakistan than in the United States.