Now Playing: Joaquin 'El Chapo' Guzman Being Extradited to the US

Now Playing: Mexico says murder has been ruled out in death of US college student

Now Playing: Israel says its fighter jets struck Iranian targets in Syria

Now Playing: Police guard cartel victim's funeral in Acapulco

Now Playing: Sinaloa Cartel member shows how he moves drugs across US-Mexico border

Now Playing: ABC News Live: Trump announces Kim meeting

Now Playing: North Korea meeting set after prisoners' return

Now Playing: Israel launches missiles at Iranian military targets in Syria

Now Playing: Trump meets with American prisoners freed by North Korea

Now Playing: Therapy dogs help kids with autism during dentist visits

Now Playing: Woman married days after losing arm to crocodile

Now Playing: 'Start Here' podcast: Skepticism over North Korea prisoner release

Now Playing: Israeli military blames Iranian forces for firing direct strike

Now Playing: Trump: 'Severe consequences' if Iran starts its nuclear program again

Now Playing: North Korean prisoners released

Now Playing: Troops, planes and robot tanks highlight Russian military might at Victory Day parade

Now Playing: World reacts to US withdrawing from Iran nuclear deal

Now Playing: Secretary of State in high-stakes meetings

Now Playing: Air Force orders service members to undergo daylong safety review

Now Playing: Korea 'peace village' movie set commemorates historic summit