Iran Revolutionary Guard shoots down U.S. drone

TEHRAN, Iran -- Iran's Revolutionary Guard shot down a U.S. drone on Thursday amid heightened tensions between Tehran and Washington over its 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 drone over Iranian airspace, while two U.S. officials told The Associated Press that the downing happened over international airspace in the Strait of Hormuz. The different accounts could no