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Iran's Chief Military Commander General Mohammed Ali Jafari explained that the exercise was to send a "message" to "extraterritorial enemies," in reference to the United States.
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Iran has staged a series of military drills, including a simulated attack on a US aircraft carrier, on one of the most strategic stretches of water in the Gulf.
The Islamic Revolutionary Guard launched the display of naval and air exercises near the Strait of Hormuz, through which one fifth of the world’s oil supply passes.
Video on Iranian TV showed the deployment of fast boats and missiles against a replica of an American carrier - something not seen before in military drills.
Other exercises included the shooting down of a drone and planting undersea mines.
The unit's navy chief Admiral Ali Fadavi said: "American aircraft carriers are very big ammunition depots," explaining that a direct hit could create huge secondary explosions.