HARARE, ZIMBABWE:  Zimbabwean President Robert Mugabe clenches his fist to salute Zanu PF comrades in Harare, 03 May 2000. Mugabe launched his ruling party election manifesto today ahead the upcoming elections. (ELECTRONIC IMAGE) AFP PHOTO  ODD ANDERSEN. (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
Robert Mugabe: What you need to know
Robert Mugabe, the former president of Zimbabwe, was one of Africa's longest serving leaders. CNN looks at what you need to know about him.
01:58 - Source: CNN
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HARARE, ZIMBABWE:  Zimbabwean President Robert Mugabe clenches his fist to salute Zanu PF comrades in Harare, 03 May 2000. Mugabe launched his ruling party election manifesto today ahead the upcoming elections. (ELECTRONIC IMAGE) AFP PHOTO  ODD ANDERSEN. (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
Robert Mugabe: What you need to know
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Protesters calling for the impeachment of President Robert Mugabe demonstrate outside the parliament building in downtown Harare, Zimbabwe Tuesday, Nov. 21, 2017. (AP Photo/Ben Curtis)
Celebration on Harare streets as Mugabe resigns
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epa06342344 People celebrate outside parliament after hearing the news that President Robert Mugabe resigned in Harare, Zimbabwe, 21 November 2017. Zimbabwe's parliamentary speaker on 21 November said Mugabe has resigned as President via a letter to parliament after having been president of Zimbabwe for 37 years. This comes days after tens of thousands of people took to the streets of the capital to call for President Mugabe to step down.  EPA-EFE/KIM LUDBROOK
Zimbabweans: Resignation is the work of God
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Zimbabweans gather to pray for the country in a park opposite the parliament building in downtown Harare, Zimbabwe Tuesday, Nov. 21, 2017. Zimbabwean President Robert Mugabe should acknowledge the nation's "insatiable desire" for a leadership change and resign immediately, the recently fired vice president and likely successor to the 93-year-old leader said Tuesday. (AP Photo/Ben Curtis)
Unrest grows outside Zimbabwe parliament
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Zimbabwe's President Robert Mugabe delivers a speech during the Zimbabwe ruling party Zimbabwe African National Union- Patriotic Front (Zanu PF) youth interface Rally on November 4, 2017 in Bulawayo. / AFP PHOTO / ZINYANGE AUNTONY        (Photo credit should read ZINYANGE AUNTONY/AFP/Getty Images)
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A man holding a flag of Zimbabwe takes part in a demonstration of University of Zimbabwe's students, on November 20, 2017 in Harare, to demand the withdrawal of Grace Mugabe's doctorate and refused to sit their exams as pressure builds on Zimbabwe's President Robert Mugabe to resign.
Zimbabwe's President faced the threat of impeachment by his own party on November 20, 2017, after his shock insistence he still holds power in Zimbabwe despite a military takeover and a noon deadline to end his 37-year autocratic rule.
 / AFP PHOTO / -        (Photo credit should read -/AFP/Getty Images)
Mugabe's prolonged exit fraying nerves
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FILE - In this April 7,  2016 file photo Zimbabwean President Robert Mugabe attends a meeting with the country's war veterans in Harare.  Mugabe seemed almost untouchable for much of his nearly four-decade rule. Shrewd and ruthless, he managed to stay in power despite advancing age, growing opposition, international sanctions and the dissolving economy of a once-prosperous African nation. Now, the apparent abrupt end of the Mugabe era is launching Zimbabwe into the unknown. It's a humbling close to the career of a man who crushed dissent or sidelined opponents after leading Zimbabwe since 1980. (AP Photo/Tsvangirayi Mukwazhi, File)
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