Now Playing: 2 dead in Paris knife attack

Now Playing: Police shoot knife-wielding suspect in mall

Now Playing: Oprah Winfrey, Tim Cook send powerful messages to grads

Now Playing: Police officer seen punching 17-year-old during arrest

Now Playing: ISIS claims responsibility for deadly Paris knife attack

Now Playing: New US embassy opens in Jerusalem

Now Playing: Disney's Rainbow Mickey Collection releases new products

Now Playing: How to get beauty looks inspired by Kate and Meghan ahead of the royal wedding

Now Playing: 'Deadpool 2' cast faces off in 'Deadpool: Confessions' on 'GMA'

Now Playing: 'Deadpool 2' stars dish on the action-packed sequel live on 'GMA'

Now Playing: The royal wedding augmented reality experience

Now Playing: Friend dishes on how Prince Harry, Meghan Markle fell in love

Now Playing: Woman serves as surrogate for own daughter's twins

Now Playing: Roseanne, Dan hit the road in new 'Roseanne' episode

Now Playing: Yale student speaks out about encounter with police

Now Playing: Live animals cause uproar at high school's prom

Now Playing: Meghan Markle's dad accused of staging paparazzi pictures

Now Playing: Gas prices on the rise ahead of summer travel

Now Playing: 5-year-old snatched by bear outside home

Now Playing: Southwest plane makes emergency landing