Tech CEOs hauled before Congress again, Theranos is no more, Google mulls big changes to URL’s and maybe the whole the-teens-are-abandoning-Facebook is a real thing after all? Links:Video of the Hearings (The US Senate)Facebook and Twitter testified before Congress. Conservative conspiracy theorists lurked behind them. (The Washington Post)Blood-Testing Firm Theranos to Dissolve (WSJ)HOW GOOGLE CHROME SPENT A DECADE MAKING THE WEB MORE SECURE (Wired)GOOGLE WANTS TO KILL THE URL (Wired)Americans are changing their relationship with Facebook (PEW Research)Instagram is building a standalone app for shopping (The Verge)Snap launches new styles of Spectacles that look more like traditional sunglasses (The Verge)Vimeo pivots business from media to tech (Axios)Vimeo launches stock video marketplace starting at $79 per clip (Venture Beat)