Now Playing: Knox in 60 Seconds

Now Playing: Amanda Knox Trial: A Producer's Perspective

Now Playing: New Zealand PM becomes 2nd leader to give birth

Now Playing: These realistic characters are actually made of cake

Now Playing: 'I didn't like the sight': Trump signs executive order ending family separation

Now Playing: 10-year-old Guatemalan boy reunited with his family

Now Playing: What is World Refugee Day?

Now Playing: Inside the real-life Dracula's castle in Romania

Now Playing: Moscow has a beer problem during World Cup

Now Playing: Christo goes big with another art installation

Now Playing: Debate over 'zero-tolerance' policy intensifies

Now Playing: Kim Jong-un makes state visit to China

Now Playing: Crisis at the border

Now Playing: US, South Korea suspend joint military exercise

Now Playing: Kim Jong Un makes third surprise visit to China in less than 3 months

Now Playing: Meghan Markle's father speaks out after royal wedding

Now Playing: Earthquake near Osaka kills at least 4 people

Now Playing: What is dragon boating?

Now Playing: American remains missing in Vietnam after arrest during protest

Now Playing: Mexico fans trigger earthquake sensors with World Cup celebrations