Dow futures tumble 800 points as U.S. oil tops $100 a barrel to begin the week's trading: Live updates CNBCOil surges above $100 a barrel; Trump says 'small price to pay' for defeating Iran CNBCOil Prices Surge Above $100 a Barrel for the First Time in Almost Four Years The New York TimesOil tops $100 per barrel as Iran war escalates Axios