Source:
McClatchy NewspapersWorking under extraordinary secrecy, the U.S. and Kazakh governments in the past year have moved nuclear material that could have been used to make more than 770 bombs from a location feared vulnerable to terrorist attack to a new high-security facility.
In the largest such operation ever mounted, U.S. and Kazakh officials transferred 11 tons of highly enriched uranium and 3 tons of plutonium some 1,890 miles by rail and road across the Central Asian country.
The transfer culminated a project spanning three American presidencies that was intended to prevent the material from falling into the wrong hands.
The last of 12 shipments arrived Monday at the new state-of~the-art storage facility in remote northeastern Kazakhstan, near the border with Russia and China. The 13-day journey began at the mothballed BN-350 breeder reactor in the Caspian Sea port of Aktau. McClatchy Newspapers agreed to withhold the secret location of the storage site for security reasons.
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http://www.kansascity.com/2010/11/16/2440769/us-kazakhstan-complete-secret.html