Trump spent his final day at NATO disputing intelligence that said U.S. strikes on Iran's nuke facilities set the country back only by months.

Trump spent three days issuing a barrage of public assurances, calmly delivered threats, contradictory signals and eventually a curse-filled damnation of Israeli and Iranian leaders.

Iran has the possibility of retaliating within a "sweet spot" without provoking another round of attacks from the U.S., but overall has a "wide range of options," according to ABC News contributor Steve Hill, an honorary professor in the Department of War Studies at King's College London.