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Unpacking the threat of nuclear war as Russia's war in Ukraine intensifies

Russian President Vladimir Putin ordered his nuclear forces on heightened alert over the weekend. Some experts see his comments as bravado, but others fear that nuclear escalation is possible.

NPR’s Geoff Brumfiel reports

This article was originally published on WBUR.org.

Copyright 2022 NPR. To see more, visit https://www.npr.org.