Now Playing: Hillary Clinton Says Nigerian Government 'Somewhat Derelict' in Response to Kidnapping
Now Playing: The Wrap: 5/07/14
Now Playing: Terrorist Group Threatens Nearly 300 Kidnapped Schoolgirls
Now Playing: Astronauts Train for Crash Landing in Remote, Winter Environment
Now Playing: Bombings Kill Dozens in Syria
Now Playing: Locusts Fly Over Argentina Farms
Now Playing: Locusts Swarm Farms in Argentina
Now Playing: What to Know About the Zika Virus
Now Playing: How the Paris Terror Attacks Unfolded
Now Playing: Au Pair Death in Vienna 'Treated as Murder,' Police Say
Now Playing: Rome Covers Up Nude Statues in Museum for Iran President
Now Playing: Russian Aid to Syria Includes 'Cookies for the Kids'
Now Playing: New ISIS Video Celebrates Paris Attacks
Now Playing: 10 Years Ago: Bob Woodruff Injured in Iraq
Now Playing: Justin Trudeau Calls School Shooting 'Every Parent's Worst Nightmare'
Now Playing: Joeys Recover From Fire in Pink and Blue Bandages
Now Playing: This is How Much Food One Starving Syrian Family Has to Eat
Now Playing: Report Finds Vladimir Putin 'Probably' Approved Critic's Assassination
Now Playing: Behind The Scenes at the World Economic Forum
Now Playing: Children Don't Migrate, They Flee
Now Playing: End of Iran Hostage Crisis: 'Nightline' Reports as Americans Are Freed
Now Playing: ISIS Destroys Oldest Christian Monastery in Iraq
http://abcnews.go.com/International/video/us-sends-military-group-aid- Nigeria -kidnapping-23631851
Now Playing: The Wrap: 5/07/14
Now Playing: Terrorist Group Threatens Nearly 300 Kidnapped Schoolgirls
Now Playing: Astronauts Train for Crash Landing in Remote, Winter Environment
Now Playing: Bombings Kill Dozens in Syria
Now Playing: Locusts Fly Over Argentina Farms
Now Playing: Locusts Swarm Farms in Argentina
Now Playing: What to Know About the Zika Virus
Now Playing: How the Paris Terror Attacks Unfolded
Now Playing: Au Pair Death in Vienna 'Treated as Murder,' Police Say
Now Playing: Rome Covers Up Nude Statues in Museum for Iran President
Now Playing: Russian Aid to Syria Includes 'Cookies for the Kids'
Now Playing: New ISIS Video Celebrates Paris Attacks
Now Playing: 10 Years Ago: Bob Woodruff Injured in Iraq
Now Playing: Justin Trudeau Calls School Shooting 'Every Parent's Worst Nightmare'
Now Playing: Joeys Recover From Fire in Pink and Blue Bandages
Now Playing: This is How Much Food One Starving Syrian Family Has to Eat
Now Playing: Report Finds Vladimir Putin 'Probably' Approved Critic's Assassination
Now Playing: Behind The Scenes at the World Economic Forum
Now Playing: Children Don't Migrate, They Flee
Now Playing: End of Iran Hostage Crisis: 'Nightline' Reports as Americans Are Freed
Now Playing: ISIS Destroys Oldest Christian Monastery in Iraq
http://abcnews.go.com/International/video/us-sends-military-group-aid- Nigeria -kidnapping-23631851