-
Now Playing: Who will win the 2018 World Cup?
-
Now Playing: Police from around the world sound off on Russia World Cup security
-
Now Playing: Speeding taxi runs into crowd of tourists on Moscow sidewalk
-
Now Playing: Children watching the World Cup celebrate after goal
-
Now Playing: Trump administration picks Texas city as new tent site for immigrant children
-
Now Playing: Family of American student arrested in Vietnam speaks out
-
Now Playing: North Korean defectors comment on summit between Trump and Kim Jon Un
-
Now Playing: Adele joins Grenfell Tower mourners
-
Now Playing: Stephen Hawking's ashes buried at Westminster Abbey
-
Now Playing: Caught on camera: Banksy print worth $45K stolen from Toronto art exhibit
-
Now Playing: Tents pop up along Mexican border for migrant children housing
-
Now Playing: A look inside the US's largest facility for undocumented children
-
Now Playing: South Korean foreign minister 'surprised' by Trump
-
Now Playing: Meghan Markle joins Queen Elizabeth on royal train for their first solo trip
-
Now Playing: Video shows Trump saluting North Korean general
-
Now Playing: The Eiffel Tower will soon be surrounded with bulletproof glass walls
-
Now Playing: Ship carrying hundreds of migrants, rejected by Italy, set to dock in Spain
-
Now Playing: South Korea 'surprised' by Trump's decision to end military drills
-
Now Playing: Grenfell Tower fire victims mourned on anniversary
-
Now Playing: Democrats questioning deals made during Trump-Kim summit