Now Playing: News headlines today: Mar. 7, 2019

Now Playing: News headlines today: Mar. 11, 2019

Now Playing: Across the Pond: Russians protest possible net censorship

Now Playing: Airline carriers ground aircraft after deadly crash

Now Playing: Ethiopian plane crash kills 157 people, 8 Americans

Now Playing: Ethiopian Airlines Boeing 737 Max 8 plane crashes, killing 157

Now Playing: US advances on last ISIS foothold in Syria

Now Playing: Trump to ask for more money to build border wall

Now Playing: Turkish Airlines makes emergency landing at JFK Airport

Now Playing: No survivors in Ethiopian Airlines crash

Now Playing: 8 Americans among 157 people killed in Ethiopian Airlines crash: Officials

Now Playing: Diver accidentally ends up inside the mouth of a large whale

Now Playing: Explosion rocks the capitol city of Stockholm

Now Playing: The oldest person in the world is 116 years and 66 days old

Now Playing: Roads near UK’s Parliament reopened after vehicle deemed ‘non-suspicious’: Met Police

Now Playing: Struggle over last ISIS stronghold in Syria

Now Playing: Barcelona-bound plane strikes several birds during landing

Now Playing: ‘Dragon’ makes successful round-trip visit to International Space Station

Now Playing: US-backed forces find foxholes and weapons near ISIS’ last stronghold

Now Playing: American journalist detained in Venezuela back in U.S.