Hours before the deadline for a decision, international delegations are still working on a nuclear agreement with Iran. <br /><br /> Negotiators from Tehran are meeting representatives of six world powers in Vienna.<br /><br /> The US Congress wants the ink dry on an deal by 6am Friday morning European time. <br /><br /> Speaking in Vienna, US Secretary of State John Kerry said real progress is being made but the work is technical and the stakes are high.<br /><br /> The deal must withstand the test of time, he said, and we are talking decades. Some issues remain unresolved.<br /><br /> The White House says the talks can continue as long as there is genuine commitment from Iran and the world powers to resolve the issues.
