In yet another show of expansionism likely to add uncertainties over regional security issues, China is eyeing deep-sea exploration in the Marianas Trench with plans to develop two deepsea manned submersibles able to reach a depth of 11 kilometers (6.8 miles) by 2020. According to an article published in the January issue of the Maritime Executive magazine, China's deepsea manned submersible Jiaolong , which set a record by diving to a depth of 7,062 meters during tests in t