Now Playing: Octopus scares off stingray camouflaged in the sand
Now Playing: 2 men rescued from top of truck amid flash flood
Now Playing: ABC News Live Prime: Thursday, July 29, 2021
Now Playing: Olympian calls conditions in isolation ‘inhuman’ after positive COVID test
Now Playing: By the Numbers: Earth Overshoot Day
Now Playing: The Rundown: Top headlines today: July 29, 2021
Now Playing: American Suni Lee takes Olympic gold medal in gymnastics
Now Playing: Firefighters race to save homes from wildfire in Turkey
Now Playing: The Breakdown: Senate advances bipartisan infrastructure bill but obstacles remain
Now Playing: Team USA’s Olympic gold rush continues
Now Playing: Wildfires, COVID-19 protests and 2020 Olympics: World in Photos, July 29
Now Playing: Sunisa Lee extends US gymnastics streak with all-around gold medal
Now Playing: ABC News Live: Seventh US athlete tests positive for COVID at Tokyo Olympics
Now Playing: Family of Texas firefighter found dead at Cancun resort speaks out
Now Playing: ABC News Live Prime: Wednesday, July 28, 2021
Now Playing: Is Russia covering up the country’s true death toll from COVID-19?
Now Playing: By the Numbers: New UNESCO world heritage sites
Now Playing: Biles will not compete in gymnastics all-around
Now Playing: Amy Robach’s Olympic update on US swimming gold, Simone Biles
