What We Know About Iran Shooting Down a U.S. Drone

The two countries disagree about where the drone was shot down: over international waters or in Iranian airspace.

An RQ-4A Global Hawk unmanned surveillance drone at Eielson Air Force Base in Alaska last year. A similar drone was shot down by Iranian forces on Thursday. Credit... Tristan D. Viglianco/Agence France-Presse — Getty Images