A boy looks at a promotional video about Chinese oil rig Haiyang Shi You 981 at a booth of China's state-run oil company CNOOC during China Beijing International High-Tech Expo in Beijing, May 16, ... more 
A boy looks at a promotional video about Chinese oil rig Haiyang Shi You 981 at a booth of China's state-run oil company CNOOC during China Beijing International High-Tech Expo in Beijing, May 16, 2014. China's "provocative" actions in maritime disputes with its neighbors are straining ties with the United States, raising questions over how the world's two biggest economies can work together, a senior U.S. official said. The strong comments from Washington on Thursday come after deadly anti-China riots broke out in Vietnam in response to China towing an oil rig into a part of the South China Sea claimed by both Hanoi and Beijing. REUTERS/Kim Kyung-Hoon (CHINA - Tags: POLITICS MILITARY MARITIME ENERGY) less 
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Reuters | Photo By KIM KYUNG-HOON / REUTERS
Fri, May 16, 2014 1:52 AM EDT