Israeli government ministers and Knesset members who will help make the decision about whether to attack Iran's nuclear facilities do not have to wait any longer for a preparatory briefing by the Israel Air Force.

They can read about all the possible scenarios for a strike on Iran, and about the potential risks and chances of success, in a study by Abdullah Toukan and Anthony Cordesman of the Center for Strategic and International Studies in Washington.

Never before has such an open, detailed and thorough study of Israel's offensive options been published. The authors of the 114-page study meticulously gathered all available data on Israel's military capabilities and its nuclear program, and on Iran's nuclear developments and aerial defenses, as well as both countries' missile inventory.


Never before has such an open, detailed and thorough study of Israel's offensive options been published. The authors of the 114-page study meticulously gathered all available data on Israel's military capabilities and its nuclear program, and on Iran's nuclear developments and aerial defenses, as well as both countries' missile inventory.
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After analyzing all the possibilities for an attack on Iran, Toukan and Cordesman conclude: "A military strike by Israel against Iranian nuclear facilities is possible ... [but] would be complex and high-risk and would lack any assurances that the overall mission will have a high success rate."

The first problem the authors point to is intelligence, or more precisely, the lack of it. "It is not known whether Iran has some secret facilities where it is conducting uranium enrichment," they write. If facilities unknown to Western intelligence agencies do exist, Iran's uranium-enrichment program could continue to develop in secret there, while Israel attacks the known sites - and the strike's gains would thus be lost. In general, the authors state, attacking Iran is justified only if it will put an end to Iran's nuclear program or halt it for several years. That objective is very difficult to attain.

Intelligence agencies are also divided on the critical question of when Iran will deliver a nuclear weapon. Whereas Israeli intelligence maintains it will have the bomb between 2009 and 2012, the U.S. intelligence community estimates it will not happen before 2013. If the Israeli intelligence assessment is accurate, the window for a military strike is rapidly closing. It is clear to everyone that no one will dare attack Iran once it possesses nuclear weapons.

Since Iran has dozens of nuclear facilities dispersed throughout its large territory, and since it is impossible to attack all of them, Toukan and Cordesman investigated the option of hitting only three, which "constitute the core of the nuclear fuel cycle that Iran needs to produce nuclear weapons grade fissile material."

Destroying these three sites ought to stall the Iranian nuclear program for several years. The three are: the nuclear research center in Isfahan, the uranium-enrichment facility in Natanz, and the heavy water plant, intended for future plutonium production, in Arak. It is doubtful whether Israel would embark on an offensive with such major ramifications just to strike a small number of facilities, when it is not at all clear that this will stop Iran's nuclearization for a significant length of time.

The study analyzes three possible flight routes and concludes that the optimal and most likely one is the northern one that passes along the Syria-Turkey border, cuts across the northeastern edge of Iraq and leads into Iran. The central route passes over Jordan and is shorter, but would not be chosen for fear of political trouble with the Jordanians. Using the southern route, which passes over Jordan, Saudi Arabia and Iraq, might likewise lead to political entanglements.

To prevent the aircraft being detected en route to Iran, the IAF would use advanced technology to invade and scramble communication networks and radar devices in the countries over which the F-15s and F-16s fly, so even though dozens of planes would pass through the countries' airspace, they will not be detected. According to the authors, the IAF used this technology in the raid on the Syrian nuclear reactor in Dayr az-Zawr, in September 2007. A hacker system was installed on two Gulfstream G550 aircraft that the IAF bought in recent years.

A strike mission on the three nuclear facilities would require no fewer than 90 combat aircraft, including all 25 F-15Es in the IAF inventory and another 65 F-16I/Cs. On top of that, all the IAF's refueling planes will have to be airborne: 5 KC-130Hs and 4 B-707s. The combat aircraft will have to be refueled both en route to and on the way back from Iran. The IAF will have a hard time locating an area above which the tankers can cruise without being detected by the Syrians or the Turks.

One of the toughest operational problems to resolve is the fact that the facility at Natanz is buried deep underground. Part of it, the fuel-enrichment plant, reaches a depth of 8 meters, and is protected by a 2.5-meter-thick concrete wall, which is in turn protected by another concrete wall. By mid-2004 the Iranians had fortified their defense of the other part of the facility, where the centrifuges are housed. They buried it 25 meters underground and built a roof over it made of reinforced concrete several meters thick.

The Iranians use the centrifuges to enrich uranium, which is required in order to produce a nuclear bomb. There are already 6,000 centrifuges at the Natanz facility; the Iranians plan to install a total of 50,000, which could be used to produce 500 kilos of weapons-grade uranium annually. Building a nuclear bomb takes 15-20 kilograms of enriched uranium. That means that the Natanz facility will be able to supply enough fissile material for 25-30 nuclear weapons per year.

Because the Natanz facility is so important, the Iranians have gone to great lengths to protect it. To contend with the serious defensive measures they have taken, the IAF will use two types of U.S.-made smart bombs. According to reports in the foreign media, 600 of these bombs - nicknamed "bunker busters" - have been sold to Israel. One is called GBU-27, it weighs about 900 kilos and it can penetrate a 2.4-meter layer of concrete. The other is called GBU-28 and weighs 2,268 kilos; this monster can penetrate 6 meters of concrete and another layer of earth 30 meters deep. But for these bombs to penetrate ultra-protected Iranian facilities, IAF pilots will have to strike the targets with absolute accuracy and at an optimal angle.