Trump says some tear gassed migrants were ‘grabbers’ posing as parents Video

Now Playing: Trump threatens to shut down the border

Now Playing: US-Mexico border reopened after migrants attempt to breach fence: Border Patrol

Now Playing: Ukraine parliament approves martial law

Now Playing: Surfing, migrant caravan, polio vaccination: World in Photos

Now Playing: Trump says some tear gassed migrants were ‘grabbers’ posing as parents

Now Playing: Migrants in Tijuana question future as asylum bids stall

Now Playing: Investigators search for Saudi journalist’s body

Now Playing: Smoke spews from Krakatau volcano during tour of island

Now Playing: Trump defends using tear gas on migrants at US-Mexico border

Now Playing: Orphaned baby orangutan enjoys a relaxing bath at a care center

Now Playing: Falling billboard injures four people in China

Now Playing: American missionary’s body may be difficult to retrieve

Now Playing: NASA’s InSight lander touches down on Mars

Now Playing: Tensions rise in violence at border town of Tijuana

Now Playing: 13th century priest’s tomb discovered in Egypt’s Luxor

Now Playing: Russia accuses Ukraine of provocation after seizing ships near Crimea

Now Playing: Protests in Paris, a choir sings in the Congo, a mummy in Egypt: World in Photos

Now Playing: Prince Harry, Meghan Markle announce move to Windsor

Now Playing: UN to hold emergency meeting on Ukraine, Russia