Iran is preparing a counter-proposal after rejecting the U.S. nuclear deal, prompting President Trump to caution that "time is running out."

Iran has further increased its stockpile of uranium enriched to near weapons-grade levels while carrying out secret nuclear activities, according to the International Atomic Energy Agency (IAEA). A recent report from the Vienna-based agency states that,

The future of high-stakes negotiations over Iran's nuclear program remains shrouded in uncertainty as the U.S. and Iran publicly clash over the terms of an interim agreement proposed by the Trump administration that is intended to pave the way for a longer-lasting deal.