Now Playing: Jim Boeheim, Syracuse U basketball coach, to retire

Now Playing: High school students help elderly custodian retire

Now Playing: Rare white panda captured on video

Now Playing: Joran van der Sloot to be extradited to US

Now Playing: Tense naval encounter with Chinese warship

Now Playing: China warship nearly collides with US warship in Taiwan Strait

Now Playing: Indian crash leaves at least 200 dead as fatalities rise

Now Playing: 2-year-old killed in Russian missile attack

Now Playing: Tension between US and China after close call

Now Playing: Huge manta ray swims by divers in Maldives

Now Playing: Gushing water pours from second-story balcony in Turkey

Now Playing: Ukraine continues to build toward counteroffensive

Now Playing: Prince Harry set to testify in British tabloids legal battle

Now Playing: Convicted murderer Joran van der Sloot being extradited to US

Now Playing: Escalating aggression from China is ‘unacceptable’: Turner

Now Playing: Russian missiles strike residential buildings in Ukraine

Now Playing: Near collision between US and China in Taiwan Strait

Now Playing: Search ends after train tragedy in India

Now Playing: Close call for Chinese, US warships

Now Playing: Zelenskyy issues grim warning ahead of Ukrainian counteroffensive