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US Secretary of State John Kerry (C) walks back to his hotel with US Under Secretary for Political Affairs Wendy Sherman (L) after a lunch following a negotiating session with Iran's Foreign Minister over Iran's nuclear program in Lausanne March 20, 2015. AFP PHOTO / POOL / BRIAN SNYDERBRIAN SNYDER/AFP/Getty Images
US Secretary of State John Kerry (C) walks back to his hotel with US Under Secretary for Political Affairs Wendy Sherman (L) after a lunch following a negotiating session with Iran's Foreign Minister over Iran's nuclear program in Lausanne March 20, 2015. AFP PHOTO / POOL / BRIAN SNYDERBRIAN SNYDER/AFP/Getty Images

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    Sides work toward Iran nuclear deal

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Sides work toward Iran nuclear deal

Questions are being raised over if there is enough "political will" to reach a nuclear deal with Iran. CNN's Nic Robertson reports.

Sides work toward Iran nuclear deal

Questions are being raised over if there is enough "political will" to reach a nuclear deal with Iran. CNN's Nic Robertson reports.