Iran Revolutionary Guard shoots down U.S. drone amid tensions

TEHRAN, Iran -- Iran's Revolutionary Guard shot down a U.S. 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 Global Hawk drone over Iranian airspace, while the U.S. said the downing happened over international airspace in the Strait of Hormuz. The different accounts could not be immediately re