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Mohammad Rezā Shāh Pahlavī was sent to New York for Cancer treatment.
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A group of angry Iranians students broke into that U.S embassy and held 66 Americans hostage.
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President Jimmy Carter sends former Attorney General Ramsey Clark and William Miller to discuss the release of hostages but Ayatollah Khomeini refuses to meet with them.
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President Carter orders Iran's bank assets in the U.S Frozen
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Khomeini ordered to release eight African-American and five female hostages. This brings the number to 53.
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The U.S asks the United Nations Security Council to warn Iran over the remaining hostages on trial, saying it was a violation of international law. The United Nations refuses.
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The U.S filed a law suit agasinst Iran in the international Court of Justice.
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The United Nations Security Council approves a resolution calling for Iran to release the hostages
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Shah leaves the U.S for treatment in Panama.
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Canadian diplomats help six American embassy employees who had not been captured flee Iran.
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Eight U.S. servicemen are killed when a helicopter and a transport plane collide during a failed attempt to rescue the hostages.
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One hostage is released because of illness. This brings the final number to 52.
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Shah dies of cancer in Cairo, Egypt.
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Deputy Secretary of State Warren Christopher and his delegation work through intermediaries in Algeria to respond to the Iranian conditions set forth in September to negotiate the release of the hostages.
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The U.S. and Iran signed an agreement to release the hostages and unfreeze $8 billion dollars of Iranian assets.
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Ronald Reagan is the new President of the U.S
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The remaining 52 hostages were released and flown to Weisbaden Air Base in Germany.