The roots of the crisis reached back decades. In 1953, the CIA and MI6 had orchestrated Operation Ajax, a coup that deposed Iran's democratically elected prime minister, Mohammad Mosaddegh, and consolidated the power of Shah Mohammad Reza Pahlavi. For the next twenty-six years, the Shah ruled as an absolute monarch, his secret police -- SAVAK -- trained by the CIA and feared for their brutal suppression of dissent. When the Iranian Revolution swept the Shah from power in February 1979, the rage at American interference did not dissipate with his departure. It concentrated. On October 22, 1979, the United States admitted the exiled Shah into New York for cancer treatment. To many Iranians, this looked like the prelude to another American-engineered restoration. The embassy walls became the target.

The embassy on Taleghani Avenue had already been briefly overrun once before, on Valentine's Day 1979, when leftist guerrillas stormed the grounds. That first occupation ended in three hours. The students who planned the November assault had learned from it. They studied the Marine Security Guard routines from neighboring rooftops, enlisted sympathetic police officers, and coordinated with Revolutionary Guards. On November 4, they moved. Within hours, sixty-six Americans were in captivity. Anticipating the takeover, embassy staff had tried to destroy classified documents in a furnace, but it malfunctioned. Forced to rely on cheap paper shredders, they left behind strips of intelligence that Iranian carpet weavers -- skilled at reconstructing intricate patterns -- painstakingly reassembled.

Fifty-two hostages would endure the full 444 days. They were blindfolded, bound, paraded before cameras, and subjected to mock executions. Some were held in isolation for months. Meanwhile, six American diplomats who had escaped the compound found shelter with Canadian Ambassador Ken Taylor and his staff. In January 1980, the CIA smuggled them out of Tehran using forged Canadian passports and a cover story involving a fictional Hollywood film -- an operation later dramatized in the movie Argo. For the remaining hostages, Carter authorized a military rescue. Operation Eagle Claw launched on April 24, 1980, but ended in disaster at a staging area called Desert One when a helicopter collided with a transport plane, killing eight American servicemen. Secretary of State Cyrus Vance, who had opposed the mission, resigned.

The crisis consumed American politics. Television news adopted a nightly countdown -- ABC's Nightline was born from the coverage. Yellow ribbons appeared on trees and lampposts across the country. Carter's inability to secure the hostages' release became the defining vulnerability of his presidency, contributing to his landslide defeat by Ronald Reagan in November 1980. In Iran, Ayatollah Khomeini leveraged the standoff to consolidate theocratic power, marginalizing moderates who favored normalized relations with the West. The invasion of Iran by Iraq in September 1980 finally shifted Iranian priorities toward negotiation.

The timing of the release carried its own message. Algeria mediated the final negotiations, producing the Algiers Accords signed on January 19, 1981. But the hostages were not released until January 20 -- minutes after Ronald Reagan took the oath of office, a final humiliation directed at Carter. The former hostages landed at a U.S. Air Force base in Wiesbaden, Germany, to a reception they could scarcely process after more than a year of captivity. The crisis severed diplomatic relations between the United States and Iran, a rupture that persists to this day. The embassy compound itself still stands in Tehran, its walls painted with anti-American murals, a museum of revolutionary memory where schoolchildren now tour the rooms where diplomats once worked and were held.