US President Barack Obama talks with Russian President Vladimir Putin on the phone

epa04105474 A handout picture made available by the White House on 01 March 2014 shows US President Barack Obama talking on the phone in the Oval Office with Russian President Vladimir Putin about the situation in Ukraine, 01 March 2014. The United States has condemned Russia’s military intervention into Ukrainian territory and called on Russia to withdraw its forces back to bases in Crimea. The strongly worded statement came from the White House following a telephone call between President Barack Obama and Russian President Vladimir Putin lasting 90 minutes. EPA/PETE SOUZA / THE WHITE HOUSE / HANDOUT HANDOUT EDITORIAL USE ONLY