Now Playing: A possible third nor'easter in under two weeks approaching

Now Playing: Race to clear roads as 2nd nor'easter heads east

Now Playing: Loyola Chicago basketball team prays with 98-year-old Sister Jean before a big win

Now Playing: A passenger with a 2-year-old was ordered off a Southwest Airlines flight

Now Playing: Man killed by a 35-pound boulder while driving down a California freeway

Now Playing: A possible 4th nor'easter in 3 weeks to hit the East Coast

Now Playing: Prosecutors show jurors how Omar Mateen entered the Pulse nightclub

Now Playing: Traffic camera video shows the devastating moment of the Miami bridge collapse

Now Playing: United Airlines flight diverted after dog 'mistakenly' placed on the plane

Now Playing: OJ Simpson speaks out in 1st extensive interview in a decade

Now Playing: Powerful home explosion caught on camera in California

Now Playing: Woman feared for her life during 2015 so-called 'Gone Girl' kidnapping case

Now Playing: Couple wrongly accused in 'Gone Girl' kidnapping case breaks silence

Now Playing: Missing girl, 16, may have flown to Cancun with 45-year-old man: Police

Now Playing: Soviet-born Trump adviser on Russian election interference

Now Playing: Video shows father and toddler being kicked off plane

Now Playing: Supporters of gay HS football player drown out church demonstration against him

Now Playing: FIU student among victims of bridge collapse

Now Playing: Mudslide in Malibu may block road for several days

Now Playing: New lawsuit filed against California fertility clinic