TOPSHOTS - US Republican Senator Bob Corker of Tennessee and ranking member of the Senate Foreign Relations Committee, asks a question of US Secretary of State John Kerry as he testifies before the Committee on Capitol Hill in Washington, DC, April 8, 2014. Kerry warned Tuesday that Russia was sending agents into eastern Ukraine to "create chaos" that the Kremlin could use as a pretext for more military intervention. "Everything that we've seen in the last 48 hours, from Russian provocateurs and agents operating in eastern Ukraine, tells us that they've been sent there determined to create chaos," Kerry told US lawmakers. TOPSHOTS / AFP PHOTO / Saul LOEB