US President Barack Obama makes a statement on the Iran talks at the White House in Washington, DC, October 1, 2009. Obama Thursday called on Iran to take 'constructive' steps after crucial nuclear talks in Geneva and warned that Washington was ready to up pressure if Tehran delayed. Getty Images logo Getty Images 2 months ago

US President Barack Obama makes a statement on the Iran talks at the White House in Washington, DC, October 1, 2009. Obama Thursday called on Iran to take 'constructive' steps after crucial nuclear talks in Geneva and warned that Washington was ready to up pressure if Tehran delayed.