The historic nuclear deal with Iran makes no mention of Americans who have been held in the country for years, drawing criticism from mogul-turned-politician Donald Trump. "We have four prisoners over there. We should have said, 'Let the prisoners out. They shouldn't be over there,'" Trump said in an interview with NBC News. While the State Department has acknowledged four Americans are in Iran against their will, it's unclear whether they're all actually prisoners. Three Americans are known to be imprisoned in Iran, including a former Marine and a Christian pastor, and a fourth is missing there
