Now Playing: The latest details on Harry and Meghan's honeymoon

Now Playing: Spectacular video of Eiffel Tower struck by lightning

Now Playing: Belgian police say man in suspected terror attack was set to return to prison

Now Playing: EU proposes to ban plastic straws, stirs, and cotton buds

Now Playing: Family thanks man who rescued boy dangling from apartment

Now Playing: 2 cops among 3 dead in Belgium shooting

Now Playing: Ex-North Korean spy chief reportedly heading to US for talks

Now Playing: Citizenship, job offered to man who scaled building to save child

Now Playing: Man scales building to save 4-year-old boy

Now Playing: US State Department confirms an American delegation is in North Korea

Now Playing: Border Patrol changes story about agent who shot and killed immigrant

Now Playing: Policeman punches young woman in the head on the Jersey Shore

Now Playing: New details emerge from surprise meeting of Korean leaders

Now Playing: South Korean president diffuses 'difficulties' with North Korea

Now Playing: American citizen and his wife freed from captivity in Venezuela

Now Playing: Defense secretary says 'possibly some good news' on Korean summit

Now Playing: Tubas, robots and lasers: Norway festival celebrates the sonic arts

Now Playing: South Koreans expect US-North Korea summit to take place 'eventually'

Now Playing: Fate of the Korea Summit

Now Playing: Explosion injures 15 at Toronto restaurant