Now Playing: Film director Ivan Reitman dies at age 75

Now Playing: Haiti faces gang violence, growing humanitarian crisis

Now Playing: Debt ceiling deal faces Senate passage

Now Playing: Sherpa rescues a climber struggling on Mount Everest's 'death zone'

Now Playing: ABC News Live: Senate to vote on Biden-McCarthy debt deal

Now Playing: Prince William, Kate attend royal wedding in Jordan

Now Playing: Thousands ordered to evacuate as wildfires rage in Canada

Now Playing: Rescued sea lions return to the ocean after recovery

Now Playing: Canada becomes 1st country to put health warnings on individual cigarettes

Now Playing: Thousands evacuated as wildfire rips through Canada

Now Playing: Attacks inside Russia heat up

Now Playing: Debt ceiling negotiators defend their deal before vote

Now Playing: Projectile narrowly missed car in Kyiv

Now Playing: Tech community sounds alarm on threat of artificial intelligence

Now Playing: Missile strikes carried out in Moscow

Now Playing: John Kirby announces more US assistances for Ukraine

Now Playing: ABC News Live: Experts warn AI poses a 'risk of extinction,' compares it to pandemics

Now Playing: Tiger quintuplets make public debut at Chinese zoo

Now Playing: WORLDVIEW: North Korea satellite launch fails

Now Playing: Airline begins asking passengers to weigh in before flights for new study