Now Playing: Boy With Cerebral Palsy Inspires by Running

Now Playing: Toddler is flower girl at bone marrow donor's wedding

Now Playing: Trump supporters glad at Trump's tough stand on immigration

Now Playing: Severe storm threat across several states

Now Playing: Cardinal McCarrick, ex-archbishop, accused with abuse claim

Now Playing: Capital Beltway closed after crash and fire

Now Playing: Alarming 911 call reveals abuse in Turpin family

Now Playing: Family reunion overwhelms traumatized adolescent boy

Now Playing: Michael Cohen resigns from RNC committee post, sources say

Now Playing: Death of unarmed teen shot by police under investigation

Now Playing: Parents clash at youth softball tournament

Now Playing: Can drinking too much alcohol raise the risk of cancer?

Now Playing: Technical glitch with American Airlines causes headaches for travelers

Now Playing: Police helicopter crashes in North Carolina

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

Now Playing: Massachusetts jogger fights off kidnapping attempt

Now Playing: NBA player Sterling Brown files federal civil rights lawsuit over stun-gun arrest

Now Playing: Crisis at the border

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

Now Playing: Earthquake near Osaka kills at least 4 people