Now Playing: More than a quarter million displaced because of California fires

Now Playing: US tourist fatally stabbed in apparent robbery in Mexico: Police

Now Playing: Chick-fil-A to deliver from more than 1,100 US chains

Now Playing: Melania Trump calls for firing of deputy national security adviser

Now Playing: Man to serve up to 10 years in prison for shooting at black teen who was lost

Now Playing: 20 people injured after car crashes into Social Security office

Now Playing: Juul to temporarily stop selling most flavored nicotine in stores

Now Playing: Pilot error blamed for fatal military plane crash that killed 9

Now Playing: 4 accused in brutal 2016 slaying of 8 family members in Ohio

Now Playing: Amazon: New headquarters to bring 25k jobs to each location

Now Playing: Family files lawsuit after bar security guard fatally shot by police

Now Playing: Potential nor'easter brewing in the east

Now Playing: New storm system to bring messy morning commute to Northeast

Now Playing: FAA changes overnight shift policy after air traffic controller scare

Now Playing: Uproar after photo shows students appearing to give Nazi salute

Now Playing: Judge finds no sign of fraud as Florida Senate recount continues

Now Playing: New AHA guidelines for battling high cholesterol and heart disease

Now Playing: Nation honors America's heroes on Veterans Day

Now Playing: Trump blames local officials for 'deadly and costly' California fires

Now Playing: Stan Lee, the man who brought superheroes to life, dies at 95