Iran shoots down U.S. drone amid tensions; ‘very big mistake,’ says Trump
By NASSER KARIMI and JON GAMBRELL TEHRAN, Iran — Iran’s Revolutionary Guard shot down a U.S. surveillance drone on Thursday amid heightened tensions between Tehran and Washington over the collapsing nuclear deal with world powers, American and Iranian officials said, though they disputed the circumstances of the incident. The Guard said it shot down the RQ-4…