VIENNA (November 27, 2012)--A diagram that The Associated Press obtained shows that Iranian scientists have run computer simulations for a nuclear weapon that would produce more than three times the explosive force of the World War II bomb that destroyed Hiroshima.

Officials of a country critical of Iran’s atomic program leaked the diagram to bolster their arguments that Iran’s nuclear program must be halted before it produces a weapon.

They provided the diagram only on condition that they and their country were not named.

The International Atomic Energy Agency, the Vienna-based U.N. nuclear watchdog, reported last year that it had obtained diagrams indicating Iran was calculating the "nuclear explosive yield" of potential weapons.