Now Playing: Pittsburgh residents react to shooting at synagogue
Now Playing: Mourners gather in Pittsburgh to remember the victims of the synagogue shooting
Now Playing: Pittsburgh shooting in Squirrel Hill, Mr. Rogers’ real-life neighborhood
Now Playing: Remembering the victims of Pittsburgh synagogue shooting
Now Playing: Pittsburgh comes together in wake of horrific synagogue shooting
Now Playing: How mail bombing suspect was tracked down
Now Playing: Students team up with Sia to share their powerful message on gun violence
Now Playing: How investigation into suspected mail bomb campaign is unfolding
Now Playing: What’s next for Megyn Kelly?
Now Playing: Panning for gold in the Yukon with the men of ‘Gold Rush’
Now Playing: What to know about the suspicious packages delivered to Clinton, Obama, CNN and more
Now Playing: We have a winner: Mega Millions winner could take $1.6 billion jackpot
Now Playing: Elle King on some of her darkest times and the music that saved her
Now Playing: Ted Cruz’s dad on Trump stumping for his son
Now Playing: In ‘Basketball: A Love Story,’ NBA greats share their love of the game
Now Playing: Lottery sales soar as Mega Millions jackpot hits record $1.6 billion
Now Playing: How Ted Cruz, Beto O’Rourke are battling it out in heated Texas Senate race
Now Playing: Thousands endure brutal conditions in migrant caravan bound for US border
Now Playing: Jamal Khashoggi killed in fist fight at consulate, Saudi media says
Now Playing: Pregnant woman found murdered, police suspect her fiance’s 11-year-old son
Read More