Now Playing: Christmas Decorations Stolen from Virginia Town

Now Playing: The Grinch Who Burned Christmas

Now Playing: Detailed account of how hero teacher took down alleged Indiana school shooter

Now Playing: Hospital staff finds way for patient to watch his twins graduate from high school

Now Playing: 2 bystanders killed gunman firing on crowded restaurantgoers: Police

Now Playing: In 3 weeks, lava has smothered about 15,000 acres of Hawaii's Big Island

Now Playing: Plane passenger faces federal charges after brawl breaks out over beer

Now Playing: Defense secretary says 'possibly some good news' on Korean summit

Now Playing: Tropical storm threatens the Gulf for Memorial Day weekend

Now Playing: Harvey Weinstein charged with 2 counts of rape and a criminal sex act

Now Playing: Police say shooter left class during test and allegedly returned with 2 guns

Now Playing: Fiat Chrysler recall involves nearly 5 million US cars

Now Playing: Highway inferno puts halt to Memorial Day travels for some drivers

Now Playing: Prom ends early after party yacht crashes into boat

Now Playing: Santa Fe teenager who died protecting others laid to rest

Now Playing: Santa Fe school shooting survivors discuss solutions to make schools safer

Now Playing: Body camera footage shows police fatally shoot naked man

Now Playing: Man attempts to swim across Pacific Ocean

Now Playing: 3 injured, 2 critically, in Portland hit-and-run

Now Playing: Indiana middle schooler returns to class with 2 guns, shoots peer, teacher: Police