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Now Playing: Afghans in Greece protest Taliban takeover
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Now Playing: US troops have evacuated 7,000 people from Kabul since Saturday, officials say
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Now Playing: Haitians in desperate need after earthquake, tropical storm
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Now Playing: ABC News Live: Biden doubles down on decision to pull out of Afghanistan
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Now Playing: Biden says new Taliban regime is going through an ‘existential crisis’
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Now Playing: State Department alerts Americans it 'cannot ensure safe passage' to Kabul airport
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Now Playing: Biden says he did not see a way to withdraw from Afghanistan without 'chaos ensuing'
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Now Playing: Biden says Afghanistan chaos was unavoidable
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Now Playing: ABC News Live Prime: Wednesday, August 18, 2021
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Now Playing: The Rundown: Top headlines today: Aug. 18, 2021