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epa04688363 A handout picture released by the White House on 01 April 2015 shows US President Barack Obama (L) and Vice President Joe Biden (R), with the national security team, participate in a secure video teleconference from the Situation Room of the White House in Washington, DC, USA, 31 March 2015, with Secretary of State John Kerry, Energy Secretary Ernest Moniz and the US team negotiating with Iran about their nuclear program in Lausanne, Switzerland. EPA/WHITE HOUSE / Pete Souza HANDOUT EDITORIAL USE ONLY