Now Playing: RAW VIDEO: Arkansas Family Rescued From Tornado Wreckage

Now Playing: How to Survive a Tornado When Caught on the Highway

Now Playing: Vilonia, Ark., Hit Hard by Tornado

Now Playing: Deadly Oklahoma Tornado Caught on Tape

Now Playing: Stripping to Pay For College

Now Playing: How Michael Jackson's Billboard Performance Was Pulled Off

Now Playing: Is a Gluten-Free Diet Really Helpful?

Now Playing: Shelly Sterling: Donald Sterling Has 'Onset of Dementia'

Now Playing: Hidden Cameras Reveal How Pickpockets Snag Valuables

Now Playing: Toddler gives hilarious rant about airport security

Now Playing: Philando Castile death: Police dashcam video released

Now Playing: US student's death after North Korea release raises questions

Now Playing: Nike is the latest brand to team up with Amazon

Now Playing: Prince Harry describes being at Princess Diana's funeral

Now Playing: Student from struggling Philadelphia HS beats odds, graduates from college

Now Playing: These brothers help Rudy Mancuso, Lele Pons, others cash in on viral stardom

Now Playing: Jackie Kennedy Onassis' Cartier tank watch to sell at auction

Now Playing: GOP candidate Handel wins Georgia special election

Now Playing: Otto Warmbier, American student detained by North Korea, dies

Now Playing: TLC is back: T-Boz and Chilli on overcoming struggle, their impact on other artists