Think tank: path to Iran nuke warhead 2-4 months

Associated Press Modified: October 8, 2012 at 11:32 am •  Published: October 8, 2012
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VIENNA (AP) — Iran could produce enough weapons-grade uranium to arm a nuclear bomb within two to four months but would still face serious "engineering challenges" — and much longer delays — before it succeeds in making the other components needed for a functioning warhead, a respected U.S. think tank said Monday.

While Iran denies any interest in possessing nuclear arms, the international community fears it may turn its peaceful uranium enrichment program toward weapons making — a concern that is growing as Tehran expands the number of machines it uses to enrich its stockpile of enriched uranium. As those fears grow, so does concern that Israel could carry out its threats to attack Iran's nuclear facilities before that nation reaches the bomb-making threshold.

In a strident call for an internationally drawn "red line" on what he said is Iran's move toward nuclear arms, Israeli Prime Minister Benjamin Netanyahu said on Sept. 28 that the world has until next summer at the latest to stop Tehran before it can build an atomic bomb. Flashing a diagram of a cartoon-like bomb before the U.N. General Assembly, Netanyahu said Iran is ready to move to the "final stage" of making such a weapon by then.

For now, U.S. military and intelligence officials say they don't believe Iran's leadership has made the decision to build a bomb, while also warning that the country is moving closer to the ability to do so.

The Institute for Science and International Security did not make a judgment on whether Iran plans to turn its enrichment capabilities toward weapons making. But in its report made available to The Associated Press ahead of publication Monday, it drew a clear distinction between Tehran's ability to make the fissile core of a warhead by producing 25 kilograms (55 pounds) of weapons-grade uranium from its lower enriched stockpiles and the warhead itself.

"Despite work it may have done in the past," Iran would need "many additional months to manufacture a nuclear device suitable for underground testing and even longer to make a reliable warhead for a ballistic missile," the report said.

Beside its payload of weapons grade uranium, a nuclear warhead also needs to have a complicated trigger mechanism that sets off a chain reaction in the weapons grade uranium — the fissile core of such a weapon — resulting in the high-power blast and widespread radiation characteristic of such weapons. While the International Atomic Energy Agency says Iran may have worked secretly on testing such a nuclear trigger, Iran vehemently denies any nuclear weapons experiments.



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