1. Iran shot down a U.S. surveillance drone like the one seen above, ratcheting up tensions between the two countries.

President Trump warned that the U.S. would “not stand for it,” but offered a way out of escalation by blaming someone “loose and stupid” in Iran.

Our Interpreter columnist suggests an explanation for Tehran’s provocations: “Because Iran cannot defy American might on its own, it may be hoping to coerce European and Asian nations to rein in the United States.”