Now Playing: Summer Diet Blunders

Now Playing: Beating Childhood Obesity

Now Playing: 'The Bachelor' sneak peek: Former Miss USA competitors battle over Colton

Now Playing: Passengers stranded on runway in sub-zero temperatures for over 16 hours

Now Playing: Dems reject Trump's proposal as shutdown continues

Now Playing: American figure skater commits suicide after sexual misconduct allegations

Now Playing: New fallout after viral confrontation between high schoolers, Native Americans

Now Playing: Sen. Kamala Harris announces 2020 presidential run

Now Playing: Airbnb customer finds hidden camera in apartment

Now Playing: Almost-Bachelors Jason and Blake share their advice for Colton

Now Playing: Children give speeches inspired by Martin Luther King Jr.

Now Playing: 'I Am The Night's' Chris Pine teases himself over Monday morning energy

Now Playing: Sarah Jessica Parker hints at return of her iconic character Carrie Bradshaw

Now Playing: How to style winter boots with any outfit

Now Playing: How to prevent suffering from burnout

Now Playing: Prince Philip spotted driving after car crash

Now Playing: Dangerous deep freeze as Northeast temperatures plunge

Now Playing: Making a difference: Mom thankful to receive coats for her kids this season

Now Playing: Man in custody for 4 'brutal' killings that shook communities: Officials

Now Playing: 2 dead, 4 hurt in plane crash in Ohio: FAA