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Vienna Document on Confidence and Security-Building Measures

How Russia’s retreat from the Vienna Document information exchange undermines European security

By Gabriela Iveliz Rosa-Hernández | Nuclear Risk

Ukrainian servicemen seen along the frontline outside of Svitlodarsk, Ukraine on January 30. (Photo by Stringer/Anadolu Agency via Getty Images)

How the demise of an arms control treaty foreshadowed Russia’s aggression against Ukraine

By Amy J. Nelson, Adam Twardowski | Analysis, Nuclear Risk