Now Playing: Trump makes case for border wall in national address

Now Playing: President Trump to address nation tonight

Now Playing: News headlines today: Jan. 9, 2019

Now Playing: Popular DJ pleads guilty after DNA helps crack cold case

Now Playing: Couple survives being trapped by 2 avalanches

Now Playing: Protests erupt in New Jersey over death of young black man

Now Playing: Police collect DNA at nursing home where comatose woman gave birth

Now Playing: DJ admits to murder, apologizes to victim’s family

Now Playing: Paraplegic United passenger ‘had to scoot down the aisle’ on his bottom

Now Playing: Second man found dead at Democratic donor’s house

Now Playing: The President addresses the nation in making case for a border wall

Now Playing: Trump and Democrats battle over funds for a border wall

Now Playing: Nissan unveils new LEAF at CES

Now Playing: Mom’s viral workout video inspires millions as she vows to lose 451 pounds

Now Playing: No stylist, no makeup artist: Jameela Jamil takes on industry standards in Hollywood

Now Playing: Trump argues national security ‘crisis’ at US southern border

Now Playing: Pregnant woman says off-duty sheriff’s deputy used stun gun on her

Now Playing: 9-year-old calls 911, saves his diabetic grandfather’s life

Now Playing: Video shows moose wandering into Alaskan hospital