'Trikers' Drive Three Wheeled Motorcycles Video

Now Playing: Fat Blocking Pepsi Special: New Soda Hits Stores in Japan

Now Playing: Possible Break in Phoenix Highway Shootings Case

Now Playing: New Video of Former Tennis Player James Blake Slammed to Ground By NYPD Officer

Now Playing: New Study Suggests Lowering Top Blood Pressure Number Reduces the Risk of Heart Attack

Now Playing: Police Release Interrogation Tapes in Kayak Murder Mystery

Now Playing: 9/11 Remembered

Now Playing: Index: New Images of Pluto Raise Questions About the Planet's Atmosphere

Now Playing: Scenes in Hungary Spark Global Outrage

Now Playing: Biden's Emotions on Display at 9/11 Memorial and During Stephen Colbert Interview

Now Playing: Massive Wildfire From Phoenix to California is Exploding in Size and Forcing Evacuations

Now Playing: Child Refugees Are Working in the Fields Picking Crops

Now Playing: Over a Million Syrian Refugees Living in Camps in Lebanon

Now Playing: Refugees Escaping War-Torn Syria Are Overflowing in Hungary

Now Playing: Tense Situation for Drivers in Phoenix Amid Fears of a Sniper

Now Playing: NYPD's Top Cop Apologizes to Former Tennis Star James Blake

Now Playing: Donald Trump Criticized Over Comments About Carly Fiorina's Face

Now Playing: Investigation Into British Airways Plane Fire Focuses on Engine

Now Playing: Index: Second Death Linked to Salmonella in Cucumbers

Now Playing: Highway Sniper? 11 Incidents in 11 Days Being Investigated in Phoenix


Click here to know more.