US President Donald Trump (L) and French President Emmanuel Macron walk through the Colonnade before heading to the Oval Office at the White House in Washington, DC, on April 24, 2018. / AFP PHOTO / Brendan Smialowski
<p>President Donald Trump and French President Emmanuel Macron walk through the Colonnade before heading to the Oval Office at the White House in Washington. Brendan Smialowski&nbsp;/ AFP</p>

Why Iran is unlikely to return to the negotiating table