Now Playing: Smartphone Is 1st Made in America

Now Playing: 9 dead, more than 12 wounded after van jumps curb: Police

Now Playing: Tip led police to suspect in Waffle House deadly shooting: Authorities

Now Playing: France's president gets official state visit to the White House

Now Playing: Mounting questions about whether Trump's lawyer will flip on president

Now Playing: Heavy rain and flood watches are moving across the East

Now Playing: Prince William, Duchess Kate welcome baby boy to the royal family

Now Playing: Chaos aboard flight as police use stun gun to arrest, remove passenger

Now Playing: Surprise! Proud parents get a bit of the royal treatment

Now Playing: FAA issues rare emergency directive after fatal Southwest engine failure

Now Playing: New York Yankees step up to the plate for 4th-grader in need

Now Playing: Woman wanted by authorities in double slaying arrested at restaurant

Now Playing: Hotel housekeepers are using a new tool for protection

Now Playing: Democratic Party launches legal attack against Trump's inner circle

Now Playing: Comey memos: 15 pages of meticulous detail, written in real time

Now Playing: 19-year-old arrested after entering school and allegedly shooting student

Now Playing: Investigators searching for motive after 2 officers fatally shot in restaurant

Now Playing: N. Korea says it will suspend all nuclear and ICBM tests

Now Playing: Prince may have unknowingly taken counterfeit medication laced with Fentanyl: Authorities

Now Playing: Viral video captures 6-year-old scoring puck from Washington Capitals player