big tech should be called massive tech these days. america's tech giants are becoming unfathomably large and powerful. apple's market cap is almost $3 trillion. that is a 3 followed by 12 zeros. microsoft isn't too far behind and the titans of the industry have net worths to match. forbes says the three richest people in the world are tesla's elon musk, amazon's jeff bezos and bill gates. ro khanna's district is the beating heart of tech money, silicon valley. apple and google are both headquartered in the area he represents, but khanna acknowledges that america has a big tech problem and says we need to fix it. his new book "dignity is a digital age" is all about solutions.