Now Playing: Ben Carson: Raise rent for low-income tenants

Now Playing: Photographs capture baby boom at fire department

Now Playing: Judge rules in favor of couple seeking to have son evicted from house

Now Playing: Severe thunderstorm watches from Ohio Valley to the Northeast

Now Playing: In Hawaii, lava breaches property of power plant as fissures reactivate

Now Playing: Former USC students file lawsuit against the school

Now Playing: 16-year-old faces adult 1st-degree murder charges in officer's slaying

Now Playing: Trump on North Korea summit: 'There is a chance it will work out'

Now Playing: Man dead after barricading himself in apartment: Police

Now Playing: Coast Guard searching for 50-year-old who disappeared from Carnival cruise ship

Now Playing: Lawyer caught on video in anti-immigrant rant apologizes: 'I am not racist'

Now Playing: DC mayor reveals she's adopted a baby, become a single mom

Now Playing: A woman to lead the New York Stock Exchange for the first time

Now Playing: 'I got attacked by a mountain lion,' survivor of cougar mauling says in 911 call

Now Playing: Judge orders 30-year-old man to vacate parents' home

Now Playing: Officer heard on video telling man he can break into ex-girlfriend's home

Now Playing: Grocery omits Latin word due to its similarity to profanity

Now Playing: Police confirm all suspects arrested in Baltimore County police shooting

Now Playing: Girl Scouts on how Meghan Markle inspires them: 'She speaks up for women'

Now Playing: Man dies at supermarket during police altercation