Now Playing: News headlines today: Nov. 8, 2018

Now Playing: News headlines today: Nov 12, 2018

Now Playing: Sen. Kristen Gillibrand discusses her new book live on ‘GMA’

Now Playing: Michelle Obama surprises a dance class at her former high school

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Now Playing: Statewide recount underway in Florida as other races hang in the balance

Now Playing: Strong winds, heat fuel California fires

Now Playing: California fire official describes historic wildfires from the front lines

Now Playing: California firefighters brace for worsening conditions as fires rage on

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Now Playing: Entire California town destroyed by Camp Fire

Now Playing: What the devastation in California looks like from above

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Now Playing: Michelle Obama reflects on what she wants her legacy to be: Part 6

Now Playing: Michelle Obama surprises students in a dance class at her former high school: Part 5

Now Playing: How Michelle Obama reacted to Donald Trump winning the presidency: Part 4

Now Playing: Michelle Obama on the bruising campaign to the White House: Part 3

Now Playing: Michelle Obama opens up about miscarriage, IVF and marriage counseling: Part 2