Old Soviet Nuclear Site In Asia Has Unlikely Sentinel: The U.S. -- New York Times
KURCHATOV, Kazakhstan — Twenty years after the Soviet Union collapsed and tens of thousands of soldiers abandoned their posts at this remote site in northeastern Kazakhstan, the footprints of another great power — the United States — are increasingly visible.
The United States Defense Department has paid for aerial drones to spot intruders, and for motion detectors that signal when a person, or a horse or a car, crosses into restricted territory. The classified project aims to keep terrorists away from what the Soviets left behind in patches of earth and a warren of tunnels that they used for atomic testing: among other things, plutonium and highly enriched uranium that Western scientists fear could be used to build an improvised nuclear device.
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My Comment: I guess if the U.S. was not watching over these sites .... no one else would.