China

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Shuai Peng, of China, returns a shot against Roberta Vinci, of Italy, during the third round of the 2014 U.S. Open tennis tournament, Friday, Aug. 29, 2014, in New York. (AP Photo/Frank Franklin II)

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Three B-2 bombers completed a tour of duty in Guam this week, as tensions remained high between the U.S. and China. (Department of Defense via Associated Press)

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Agnieszka Radwanska, of Poland, returns a shot against Shuai Peng, of China, during the second round of the 2014 U.S. Open tennis tournament, Wednesday, Aug. 27, 2014, in New York. (AP Photo/Elise Amendola)

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In this July 18, 2014 photo, Chinese tourists visit the South Coast Plaza Shopping Center in Costa Mesa, Calif. Chinese tourism is surging and the mall is a popular destination that is doing what it can to keep the buses coming, from accepting China’s UnionPay card to providing Mandarin-speaking salespeople. Tourism from China to the United States has soared since the countries signed an agreement in 2007 promoting travel. (AP Photo/Damian Dovarganes)

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A Russian sport called the Tank Biathlon has gripped China's military buffs and has been intensely reported and discussed in the media, including on hundreds of China's Internet-based military forums. (AP Photo/Czarek Sokolowski)

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In this photo taken by cellphone and released by China's Xinhua News Agency, men search the rubble of buildings for survivors after an earthquake in Ludian County of Zhaotong City in southwest China's Yunnan Province. (AP Photo/Xinhua/Hu Chao)

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In this photo taken July 16, 2014, church members pray in a private room in Jiu'en Tang, a Christian church, in the Shuitou township in Wenzhou in eastern China's Zhejiang province. Across Zhejiang province, which hugs China's rocky southeastern coast, authorities have toppled, or threatened to topple, crosses at more than 130 churches. (AP Photo/Didi Tang)

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U.S. climate change envoy Todd Stern said recent talks with China were "positive," but also said the two nations "talked a lot and agreed on little." (Associated Press)