caroline: michael tiffany, great to have you on. thank you, and bob o'donnell, sticking with me.ecoming quite the coast. former martin shirley, pharmaceutical ceo, will be on the show. be sure to tune in for the bad boy of pharma. tech continues to be breaking ground with huge leaps in ai, autonomous driving, and drones. but will the momentum come to a halt? we will discuss next. this is bloomberg. ♪ caroline: the tech industry is having a monumental 2016. spacex landed on an unmanned rocket and amazon is taking flight in commercial drug delivery. the industry now faces possible disruption under trump. bloomberg technology executive editor brad stone writes about silicon valley's reckoning with its own political power. brad stone joins us now. still here is bob o'donnell. brad, talk us through the high points. >> it was a time to reflect. certainly a great year for tech. one of the interesting moments from the summer was when the five most valuable companies in the world by market cap where the five big tech companies. that lasted about seven weeks. a little window into the futur