for that we welcome bob hormats. f goldman sachs a former undersecretary of state and a former deputy u.s. trade representative bob, with all of those hats, let's turn to what we're dealing with with the situation with chinaright now what's happening >> it's complicated because it's a multilevel problem first of all were there are going to be frictions. one, we're a market-driven economy. we're comfortable in the notion we're going to be advanced in technologies for the indefinite future now for the first time we have a real competitor in artificial intelligence, robotics, biotech, a whole range of things. and they're developing very rapidly. i was just there a few weeks ago in their silicon valley. they're developing new technologies of their own. third, many of these technologies have security implications not just for economic benefit of the country, but security related issues which adds to tensions and fourth, the concept of what he rules should be differ between our views and beijing's views. >> let's go back to