Now Playing: Alexa sends family's private conversation to random contact

Now Playing: New accusations against Facebook

Now Playing: Defense secretary says 'possibly some good news' on Korean summit

Now Playing: Twitter users blocked by Trump may soon get a reprieve

Now Playing: University of Central Florida develops LED fabric

Now Playing: Concerns grow over Amazon's facial-recognition software

Now Playing: Siri gets a new voice

Now Playing: New Facebook feature helps protect user data

Now Playing: Apple expected to announce slow growth

Now Playing: Twitter says an internal glitch exposed all users' passwords internally

Now Playing: InSight launch set to blast off Saturday from California

Now Playing: Facebook users seemingly unfazed by recent data breach

Now Playing: Sears teams up with Amazon for tire installations

Now Playing: Cambridge Analytica shutting down, files for bankruptcy

Now Playing: Cambridge Analytica is shutting down

Now Playing: Spotify introduces new policy on hateful conduct

Now Playing: Amazon to expand cashier-less grocery stores

Now Playing: Deep summer discounts for Amazon Prime members in Florida

Now Playing: Uber wants to test flying taxis

Now Playing: Nintendo to re-release its NES Classic Edition console