US Vice President Joe Biden on May 27 denounced Vladimir Putin's "pure aggression" in Ukraine, warning that Western nations must be prepared to respond with further sanctions against Russia if necessary.
Russia's War Against Ukraine
Agence France-Presse: Biden castigates Putin, casts Ukraine crisis as a test
U.S. Vice President Joseph Biden speaks at the Brookings Institute May 27, 2015 in Washington, DC.
