this year's second prize high school west winners are 11th graders from n barer innovation academy many mansfield, texas, where c-span is available through spectrum. their winning documentary which talks about u.s.-china relations over the last 20 years is entitled "the greatest competitor." >> 20 years another bytedance was established. then it developed tiktok, which has more than 11 million american monthly users. >> politicians have begun to worry about the reach of tiktok. the anxiety of the chinese-made app is a reflection of the larger struggle between the u.s. and china, a country which in the last 20 years the united states has begun to see as its greatest competitor. >> the balance of power has shifted. it is china that now holds a much more dominant, much more powerful position. >> the whole idea in the early 2000's was the united states would help guide china in growing their economy and becoming part of the intergovernmental systems that the united states had helped guide after world war ii. >> 20 years ago, china -- the yates had a policy of encouraging the development of