President Trump said on Friday that he's convening his national security team in the White House Situation Room to make a final decision about the agreement reached between U.S. and Iranian negotiators. Why it matters: The signing of the memorandum of understanding (MOU) would be the most significant diplomatic breakthrough since the war started, but a final agreement tackling Trump's nuclear demands would require further negotiations. The text of the MOU — which involves a 60-day ceasefire ex