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Depositing ratifications related to the Treaty on the non-proliferation of nuclear weapons by the depository countries--the USSR and the USA. Protocols on the deposition of the USA's instrument are being signed by Soviet Foreign Minister Andrei Gromyko (right) and US ambassador Jacob Dyneley Beam in the USSR, taken on March 5, 1970. (KEYSTONE/SPUTNIK/B. Egorov)