A ceremony for the fourth dive of Jiaolong, China's manned submersible, is held aboard "Xiangyanghong 09" in the Mariana Trench on June 24, 2012. China's manned submersible, Jiaolong, made its fourth dive in the Mariana Trench on Sunday morning to attempt the world's first 7,000-meter dive below the surface of the Pacific Ocean. [Xinhua] |
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