Today's major tech headlines include an inquiry into the national security risk posed by TikTok, Twitter's failure to meet revenue expectations and Apple TV's app launch on Amazon Fire devices.

The Abarth treatment kicks the performance of Fiat's roadster up a notch.

Plus, Twitter quarterly results disappoint.

Ride-hail service Lyft is facing a growing number of lawsuits brought by female riders who say Lyft can’t keep ignoring the problem.

Today's major tech stories include Mark Zuckerberg's latest grilling on Capitol Hill, Google's quantum computing breakthrough and a studying showing almost all political tweets come from only around 10 percent of users.

The second-generation Audi Q3 SUV is a huge improvement over its predecessor, and thanks to its best-in-class infotainment tech and solid driving dynamics, makes a strong case for being the pick of the litter.

The Toyota Mirai has undergone quite a transformation. The once-homely sedan has evolved into a rakish four-door that looks worthy of a Lexus badge.

Mazda's first electric vehicle will be a compact coupe-over that promises a blend of driving joy and eco-friendliness.

The Facebook CEO takes the hot seat at a congressional hearing on the company's proposed cryptocurrency.

Nissan's electric SUV concept doesn't look too far-out futuristic, and that's intentional. A production version of this EV is right around the corner.