Now Playing: Facebook prompts users to read articles before sharing
Now Playing: June’s online sales showdown
Now Playing: Twitter’s verification process is back in service
Now Playing: Hacker conference brings together top cyber players in Russia
Now Playing: What you need to know about ransomware
Now Playing: Twitter warns its users against deceptive information
Now Playing: US government warns of growing cyber threats
Now Playing: Investigators release new details in San Jose mass shooting
Now Playing: Navigation glitch leads Mars helicopter on wild ride
Now Playing: Everything you need to know about Mercury going into retrograde in Gemini
Now Playing: Tesla loses 2 top safety endorsements
Now Playing: Lunar vehicle in works for NASA’s upcoming mission to the moon
Now Playing: ABC News Live Prime: Wednesday, May 26, 2021
Now Playing: Costly ransomware attacks hits businesses, cities
Now Playing: Instagram now lets users hide likes on posts
Now Playing: Google rolling out its new operating system
Now Playing: Airbnb announces changes to its platform
Now Playing: Gadgets for kids
Now Playing: Netflix entering video game business