Now Playing: NBA rookie who was tased by Milwaukee police hopes to be a 'voice'

Now Playing: Hurricane season forecast to be at or above average

Now Playing: Breaking down the student debt crisis in the US

Now Playing: 77-year-old school bus driver charged in deadly crash with a dump truck

Now Playing: Memorial Day shopping: Sizzling summer sales

Now Playing: Trump awards Medal of Honor to former Navy SEAL for 'daring assault' in Afghanistan

Now Playing: Who is Sterling Brown?

Now Playing: The 2018 Atlantic hurricane season forecast

Now Playing: Former homeless teen gets full scholarship to Harvard

Now Playing: North Korea summit cancelled as DOJ investigation continues

Now Playing: NFL reveals new national anthem policy, Trump weighs in

Now Playing: Katty Kay and Claire Shipman discuss raising confident girls

Now Playing: 1-year-old girl dies after being left in car seat all day: Police

Now Playing: School van carrying children crashes through North Miami restaurant

Now Playing: Rape reported at MIT fraternity party: University police

Now Playing: Remains of missing teen girl found in park, police say

Now Playing: Suspect in woman's disappearance is a missing person

Now Playing: Rape survivor wins $1B verdict against security guard's employer

Now Playing: Mysterious booms in the night worry residents

Now Playing: Abduction at Walmart was a planned hoax, police say