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The U.S. Defense Department reportedly has completed simulated war games to determine the feasibility of destroying Iran’s nuclear weapons program.

The Atlantic Monthly magazine reported in its latest issue that the Pentagon held simulations of a U.S. military strike on Iranian bases and nuclear facilities. The magazine said the recent war games also included a ground invasion of Iran.

The simulation envisioned a three-phase war against Iran. The first phase was composed of air strikes against bases of the Iranian Revolutionary Guard Corps, believed to control Iran’s nuclear and missile programs.

U.S. intelligence sources were quoted as saying that such a strike would require one day and would be the easiest part of any military campaign.

The second part of the simulation consisted of air strikes on suspected Iranian nonconventional weapons sites and support facilities. The magazine said the Pentagon and intelligence community identified 300 such sites, including 125 biological, chemical and nuclear complexes.

The third part was a ground invasion of Iran from five directions in an operation that would take about two weeks. U.S. troops would enter from Iraq, the northern Persian Gulf, Azerbaijan, Afghanistan and Georgia.

In the simulation, American troops surrounded but did not enter Tehran. Washington then helped appoint an Iranian government friendly to the United States.

The magazine said a war against Iran would be dangerous. The simulation was said to have included Iranian counterattacks, including use of its missile arsenal as well as insurgency attacks in the Gulf and Iraq. The exercise also took into account al-Qaida strikes inside the United States.

Members of the National Security Council, CIA, Pentagon and State Department attended the simulation, Atlantic reported.

The magazine said the simulation envisioned a scenario in which the International Atomic Energy Agency announced it no longer maintained hope in Iranian pledges to stop its uranium enrichment program.

A day following the IAEA announcement, according to the simulation, Iranian supreme leader Ali Khamenei announced that Tehran would continue its nuclear program. At that point, the scenario envisioned a 9 a.m. Friday National Security Council meeting to discuss an imminent U.S. military strike.

The Pentagon exercise also envisioned the need for U.S. help from its Middle East allies. This included the use of air space of Jordan, Saudi Arabia and Turkey as well as air refueling facilities by Israel.

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