-
Now Playing: NTSB 'unhappy' with Tesla over crash disclosures
-
Now Playing: High-tech credit card will have built-in fingerprint scanner
-
Now Playing: Website created to help find vaccine appointments promotes another cause
-
Now Playing: SpaceX rocket explodes during test flight
-
Now Playing: SpaceX landing ends in fiery crash
-
Now Playing: Google plans to stop selling ads based on users' search history
-
Now Playing: Sleep problems associated with smartphone addiction
-
Now Playing: Twitter cracks down on COVID-19 vaccine misinformation
-
Now Playing: Verizon advises to turn off 5G for battery saving
-
Now Playing: ABC News Live: Hidden Figures
-
Now Playing: NASA officially names D.C. headquarters after Mary W. Jackson
-
Now Playing: NASA names DC headquarters after Mary W. Jackson
-
Now Playing: TikTok settles $92 million in lawsuits
-
Now Playing: YouTube announces new parental controls
-
Now Playing: The science on halting the gene that causes heart disease
-
Now Playing: New images of Mars and a secret message from rover
-
Now Playing: People turn online and to apps to improve mental health during pandemic
-
Now Playing: Samsung unveils its foldable phones
-
Now Playing: Elon Musk suffers loss of $15 billion
-
Now Playing: By the Numbers: The 500,000 American lives lost to COVID-19