(Reuters) - President Barack Obama issued an unprecedented videotaped appeal to Iran on Friday offering a "new beginning" of diplomatic engagement to turn the page on decades of U.S. policy toward America's longtime foe.
Aliakbar Javanfekr, an aide to Iranian President Mahmoud Ahmadinejad, responded by saying that Obama should fundamentally change Washington's policy toward Iran.
Obama's appeal, timed to mark the Iranian New Year, highlighted a sharp shift of tone from former President George W. Bush's efforts to isolate the Islamic Republic, which he had labeled part of an "axis of evil." Washington and Tehran are deeply divided on many issues, including Iran's nuclear ambitions and support for militant Islamic groups.
Here are some details:
-- In August 1953, the CIA helped orchestrate the overthrow of Iran's popular prime minister, Mohammed Mossadegh, restoring the Shah, Mohammed Reza Pahlavi, to power.
-- Washington acted after Britain, opposed to Mossadegh's policy of nationalizing the British-controlled oil industry, convinced U.S. officials the prime minister was turning to communism. As Britain's power faded, the United States became the symbol of what many Iranians saw as Western imperialism.
-- A 1972 visit by U.S. President Richard Nixon cemented a close strategic relationship between Iran and the United States. But opposition to the Shah, led by exiled cleric Ayatollah Ruhollah Khomeini, mounted.
-- After bloody clashes between protesters and troops, the Shah fled into exile in January 1979. The next month, Khomeini returned to Iran in triumph to seal victory for a revolution whose mantra was "Death to America."
-- In November 1979, Iranian students seized the U.S. embassy in Tehran and took 90 hostages; 52 were held captive for 444 days, prompting Washington to break relations in 1980.
-- U.S. President Ronald Reagan admitted to secret arms deals with Iran that broke a U.S. embargo. The trade was aimed at winning the release of Americans held by pro-Iranian Shi'ite militants in Lebanon. Money from the sales was secretly passed to U.S.-backed Contra guerrillas in Nicaragua. At the time, Iran was embroiled in war with President Saddam Hussein's Iraq, in which the United States gave increasing support to Baghdad.
-- Iranian voters swept reform-minded President Mohammad Khatami to power. He promoted a "dialogue among civilizations." During his term, Iranians staged an impromptu vigil in Tehran when hijacked planes struck U.S. targets on September 11, 2001.
-- After those al Qaeda attacks, Iran offered support in a U.S.-led war to topple Afghanistan's Taliban leaders, who were shielding al Qaeda chief Osama bin Laden. Iran helped ensure the success of a multilateral postwar conference on Afghanistan's future. In January 2002, Bush branded Iran part of an "axis of evil" and accused it of seeking nuclear weapons.
-- The U.S.-led invasion of Iraq removed Saddam, a Sunni Arab leader who had been a deadly enemy of Iran, and brought to power Iraqi Shi'ite factions with closer links to Tehran.
-- As Iraq descended into insurgency and sectarian conflict, the United States accused Tehran of arming, funding and training Shi'ite militias that have attacked U.S. forces in Iraq. Iran denied this, blaming the U.S. troop presence for the violence.
-- The United States led efforts to toughen U.N. sanctions on Iran over its nuclear program and in March the Security Council adopted a third sanctions resolution. Iran says the program is lawful, peaceful and designed only to generate electricity, but it has failed to convince the West.
-- U.S.-Iran tensions worsened since the 2005 election of President Mahmoud Ahmadinejad, who berated the West, questioned the Holocaust and called for Israel to be wiped off the map. In a surprise development, a U.S. National Intelligence Estimate in late 2007 said Iran put nuclear military plans on hold in 2003.
-- New U.S. President Barack Obama said in January that America was prepared to extend a hand of peace to Iran if it "unclenched its fist." Ahmadinejad said Tehran was ready to talk but demanded a fundamental change in U.S. policy.
-- U.S. Secretary of State Hillary Clinton said in March that Obama's government intended to invite Iran to an international conference on Afghanistan. Iran said it would consider the invitation and was ready to offer any help.
-- On Friday, Obama issued a videotaped appeal to Iranian leaders and their people, saying his "administration is now committed to diplomacy" that addresses the full range of issues before them and "to pursuing constructive ties."
Iran said later that Obama should fundamentally change Washington's policy toward Iran and should "realize its previous mistakes" and make an effort to correct them.