Now Playing: FBI hunting for serial bank robber ‘Lunch Break Bandit’ across Arizona

Now Playing: New ‘Star Wars’ trailer viewed more than 10 million times

Now Playing: Diane Sawyer sits down with Michael and Cameron Douglas

Now Playing: Couple’s grandmothers take the aisle as flower girls in wedding

Now Playing: Officer in Phoenix shoplifting incident to be fired

Now Playing: Mother allegedly lied about daughter’s fatal illness: Authorities

Now Playing: Amid Turkey-Russia deal, fate of Kurd civilians in the balance

Now Playing: Student opens fire on another outside California high school

Now Playing: Lori Loughlin, husband facing more charges in college scandal

Now Playing: US diplomat links Trump to order to withhold aid to Ukraine

Now Playing: Trump calls impeachment inquiry a ‘lynching’

Now Playing: Storm front that sent twisters to Texas dropping rain on Carolinas

Now Playing: 4 companies agree to $260M opioid settlement in Ohio

Now Playing: Auto body shop goes up in flames in Philadelphia

Now Playing: 2 people killed when small plane crashes while trying to land: Police

Now Playing: 4 more parents change pleas to guilty in college admissions scandal

Now Playing: Suspect seen allegedly trying to escape police custody

Now Playing: 4-time cancer survivor takes college football field for 1st time

Now Playing: 2 crew members, passenger overcome by fumes on flight

Now Playing: Desperate Kurds angry as US troops leave northern Syria