Russian President Vladimir Putin signed a bill on Monday to withdraw from a key treaty — soon after U.S. President Joe Biden's administration abandoned it — that has helped to reduce the risk of conflict between Western nations and post-Soviet Russia.
The decision by the two adversaries to end their participation in the Open Skies Treaty, which has permitted mutual unarmed surveillance flights over the 35 nations that signed onto it, adds to the already considerable friction ahead of a scheduled summit between Biden and Putin on June 16 in Geneva.
