. >> the united states policy toward china 20 years ago promoted the economic growth that brought hundreds of millions. now u.s. officials are far more wary about the chinese government. >> when the u.s. makes a foreign policy decision, it can affect hundreds of millions, if not billion, around the world. so how we move forward with china has become one of the most critical decisions u.s. politicians face today. >> there's no simple answer. >> as we look forward while considering the past, we can see the evolution of u.s. chinese relations jeopardize these emergency helicopter service, doctormatically restrict the exchange of college students and risk the peace and prosperity of not just america, but the whole world. whether american-chinese diplomatic relations, i they will affect everyday citizens. whether it's economics, what you can and can't buy and the cost of it. or whether you young men are suiting up and fighting somewhere. >> the seismic shift in the u.s.-china relations is the greatest change that americans have experienced in the last 20 years. >> to watch this and all winning