
Iranian scientists have run computer simulations for a nuclear weapon that would produce more than triple the explosive force of the World War II bomb that destroyed Hiroshima, according to a diagram obtained by The Associated Press.

An Iranian nuclear scientist was killed in a bomb blast in Tehran on Wednesday, just days after the U.N.'s nuclear watchdog agency confirmed that Iran had begun enriching uranium in an underground facility.
Force is being used to attempt to halt Iran's nuclear weapons program. On Monday, an explosion rocked the city of Isfahan in western Iran, site of a conversion facility that prepares uranium for enrichment at other sites. Conflicting reports attributed the explosion to either an accident at a gas station or a military training incident, or they denied it even happened.

Hard-line Iranian students stormed British diplomatic sites in Tehran on Tuesday, bringing down the Union Jack flag, burning an embassy vehicle and throwing documents from windows in scenes reminiscent of the seizing of the U.S. compound in 1979.
Assailants on motorcycles attached magnetized bombs to the cars of two nuclear scientists in Tehran on Monday, killing one and wounding another who is on a U.N. sanctions list for suspect activity. The president accused Israel and the West of being behind the attacks.