U.S. President Donald Trump said on Sunday that he expected to make a decision on Iran very quickly, after both countries said they held "positive" and "constructive" talks in Oman on Saturday and agreed to reconvene this week. Trump, who has threatened military action if no deal is reached on halting Iran's nuclear program, told reporters aboard Air Force One that he met with advisers on Iran and expected a quick decision. "We'll be making a decision on Iran very quickly," he said.