Now Playing: The Rundown: Top headlines today: Aug. 4, 2021

Now Playing: ABC News Live Prime: Wednesday, August 4, 2021

Now Playing: Breaking down the future of work and the debate on vaccine mandates

Now Playing: Frustration grows with 90 million Americans holding out on vaccine

Now Playing: Unvaccinated COVID patient: ‘It’s real and only getting stronger and faster’

Now Playing: Suspect charged in Navy warship fire

Now Playing: American track and field athletes stun at Tokyo Olympics

Now Playing: Winds push massive wildfires across western states

Now Playing: 3 injured in Tennessee workplace shooting

Now Playing: Cuomo facing mounting pressure to resign after sexual harassment claims

Now Playing: Louisiana medical staff spread thin as COVID-19 numbers skyrocket

Now Playing: Alleged victim speaks out after violent police encounter

Now Playing: At least 4 local district attorneys reviewing Cuomo probe materials

Now Playing: Climate scientists sound alarm over extreme temperatures at Tokyo Olympics

Now Playing: Students head back to school in Georgia as mask debate rages

Now Playing: Inside a Louisiana hospital combatting the delta variant

Now Playing: Arkansas doctor speaks out on number of children on ventilators

Now Playing: The Breakdown: Inside hospitals fighting the delta variant surge

Now Playing: Head of nation’s largest teachers union talks reopening schools

Now Playing: Female wrestler makes US Olympic history