-
Now Playing: Behind-the-Scenes With Diane Sawyer After Her Exclusive Gabby Giffords Interview
-
Now Playing: Rep. Gabby Giffords on Meeting Newtown, Conn. Shooting Victims
-
Now Playing: Entrepreneur Sheila Johnson’s trailblazing success
-
Now Playing: FDA advisory panel votes to recommend Johnson & Johnson vaccine
-
Now Playing: Navigating the often-confusing vaccine system
-
Now Playing: By the Numbers: Education bigger factor than race in COVID vaccine willingness
-
Now Playing: Congresswoman and son co-author book on opioid addiction, journey to sobriety
-
Now Playing: Firefighters battle massive blaze in California
-
Now Playing: NASA officially names D.C. headquarters after Mary W. Jackson
-
Now Playing: Here's the latest on the shooting involving Lady Gaga's dog walker
-
Now Playing: Major fire raging outside of Los Angeles
-
Now Playing: Biden visits Texas following cold weather disaster
-
Now Playing: Here’s every public figure who has gotten a COVID-19 vaccine so far
-
Now Playing: Biden delivers remarks at Houston vaccine site
-
Now Playing: What the future of ‘Chocolate City’ will look like after demographic changes
-
Now Playing: FDA nears approval of Johnson & Johnson vaccine
-
Now Playing: Rep. Schiff on Khashoggi: Crown prince has ‘blood on his hands’
-
Now Playing: US points finger at Saudi prince in Jamal Khashoggi’s murder
-
Now Playing: US officials believe Saudi crown prince was involved in Khashoggi’s death
-
Now Playing: J.J. Vallow’s grandparents on how his mom’s parenting changed