Now Playing: 2020 presidential candidate Kamala Harris shares advice for young women

Now Playing: How ABC's live 'All in the Family,' 'Jeffersons' shows still relevant social issues

Now Playing: Husband of NYPD cop accused of murder-for-hire plot reacts to being alleged target

Now Playing: McDonald's hit with complaints and lawsuits for gender-based discrimination

Now Playing: How 'All in the Family' and 'The Jeffersons' changed TV

Now Playing: Researchers brave brutal conditions to research climate change in Antarctica: Part 1

Now Playing: Antarctic whales an indicator for world environmental health, scientists say: Part 2

Now Playing: Brooklyn man found guilty in 2003 killing of student after house party: Part 1

Now Playing: Mom of man convicted of murdering student in Brooklyn vows to win his freedom: Part 2

Now Playing: Stunning landscape of tribal nation on US-Mexico border hides dark reality

Now Playing: Tribal nation on US-Mexico border on front lines of illicit cross-border trade

Now Playing: Pro and anti-abortion rights activists on future of Alabama abortion bill

Now Playing: Missing with dissociative fugue: Hannah Upp's mystery disappearance

Now Playing: Howard Stern on what he learned in therapy, abandoning 'pure id' persona: Part 1

Now Playing: Howard Stern on the moment he realized he needed to make life changes: Part 2

Now Playing: What Notre Dame Cathedral looks like today after being engulfed in flames

Now Playing: Being 'Sober Curious,' an approach to not drinking with better wellness in mind

Now Playing: Darlie Routier: The story of a woman convicted of murder after two sons' killing

Now Playing: Ryan Reynolds talks about switching it up in new movie 'Detective Pikachu'

Now Playing: Journalist discusses investigating the disappearance of Adea Shabani