内容摘要：A monthslong security crackdown that followed killed more than 500 people and saw over 22,000 detained.

A monthslong security crackdown that followed killed more than 500 people and saw over 22,000 detained.

But in January 1979, the shah, fatally ill with cancer, fled Iran as mass demonstrations swelled against his rule., led by Grand Ayatollah Ruhollah Khomeini, and created Iran’s theocratic government.

, seeking the shah’s extradition and sparking the 444-day hostage crisis that saw diplomatic relations between Iran and the U.S. severed.saw the U.S. back Saddam Hussein.during that conflict saw the U.S. launch a one-day assault that crippled Iran at sea, while

that the American military said it mistook for a warplane.Iran and the U.S. have see-sawed between enmity and grudging diplomacy in the years since, with relations peaking when Tehran made the 2015 nuclear deal with world powers. But

in 2018, sparking tensions in the Mideast that persist today.

Associated Press writer Amir Vahdat in Tehran, Iran, contributed to this report.. And the IAEA’s work in any case will make the Vienna-based agency a key player.

Here’s more to know about the IAEA, its inspections of Iran and the deals — and dangers — at play.The IAEA was created in 1957. The idea for it grew out of a 1953 speech given by U.S. President Dwight D. Eisenhower at the U.N., in which he urged the creation of an agency to monitor the world’s nuclear stockpiles to ensure that “the miraculous inventiveness of man shall not be dedicated to his death, but consecrated to his life.”

Broadly speaking, the agency verifies the reported stockpiles of member nations. Those nations are divided into three categories.The vast majority are nations with so-called “comprehensive safeguards agreements” with the IAEA, states without nuclear weapons that allow IAE monitoring over all nuclear material and activities. Then there’s the “voluntary offer agreements” with the world’s original nuclear weapons states — China, France, Russia, the United Kingdom and the U.S. — typically for civilian sites.