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 | | July 1 The United States and the Soviet Union began continuous portal monitoring under the INF Treaty, with U.S. inspectors monitoring a Soviet missile plant at Votkinsk, Russia, and Soviet inspectors monitoring a missile factory at Magna, Utah. |
 | | January At the continuous portal monitoring site in Votkinsk, Russia, the United States began installing the non-damaging Radiographic Imaging System (RIS, or CargoScan), which would image ICBMs exiting the factory to verify that they were not SS-20 missiles prohibited by the treaty. |
 | | March 9 At Votkinsk, Soviet plant officials removed the railcar which had been set aside, along with two other railcars, without allowing the American portal monitoring team to image them with the CargoScan system. |
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