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Now Playing: The Rundown: Top headlines today: May 20, 2020
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Now Playing: By the numbers: Travel and tourism industries hurt by pandemic
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Now Playing: Nurse to sing ‘Amazing Grace’ at COVID-19 memorial
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Now Playing: Country music legend Dolly Parton turns 75
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Now Playing: Wildfire emergency in West, warnings in California
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Now Playing: Mega-vaccination sites open across Los Angeles County
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Now Playing: Grim new milestone: US reaches 400,000 COVID-19 deaths
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Now Playing: 2 National Guard servicemen in DC sent home after links to extremist groups
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Now Playing: Trump releases recorded video message on his last day as president
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Now Playing: Biden prepares for the inauguration, delivers emotional farewell to Delaware
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Now Playing: Trump delivers farewell address
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Now Playing: Kamala Harris to make history as vice president
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Now Playing: Vaccine rollout coming up short
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Now Playing: Future of the GOP remains in question
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Now Playing: What to expect at Joe Biden’s inauguration
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Now Playing: Security heightened for Inauguration Day
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Now Playing: Countdown to Inauguration Day
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Now Playing: The Breakdown: Heightened security in place for Inauguration Day
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Now Playing: Who will President Trump pardon before he leaves office?
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Now Playing: Biden’s dogs will join famous line of presidential pets