Now Playing: The legal history of Roe v. Wade

Now Playing: Who was 'Jane Roe' in Roe v. Wade?

Now Playing: Kavanaugh faces questions on Roe v. Wade, Second Amendment

Now Playing: Proud Boys founder on whether he feels responsible for its controversial behavior

Now Playing: Roger the ripped kangaroo caretaker: 'Roger and I were best mates'

Now Playing: When seeing isn't believing: using AI to create 'Deepfakes'

Now Playing: This family transforms home into larger-than-life North Pole Christmas display

Now Playing: What happened the morning pregnant mom, two daughters went missing: Part 1

Now Playing: The moment Chris Watts confessed to murdering his pregnant wife: Part 2

Now Playing: NFL player Reuben Foster's ex-girlfriend describes alleged abuse

Now Playing: 'Mary Poppins Returns': Behind the scenes of how new film was made

Now Playing: At Bush's funeral, an emotional George W. Bush pays tribute to his father

Now Playing: George H.W. Bush, in his own words, reflects on his presidency, family

Now Playing: Millions leave Venezuela to keep their families alive: Part 1

Now Playing: Venezuelan migrants in mass exodus face more challenges: Part 2

Now Playing: Three years after Sandra Bland's death, questions still swirl around her case

Now Playing: George H.W. Bush: An intimate look at the life of a president

Now Playing: The life and legacy of George H.W. Bush

Now Playing: George H. W. Bush reflects on the strength drawn from family

Now Playing: Bush family speaks out after the death of their patriarch