Concerns about safety and security linger in the background of UN climate talks in Cancun, Mexico, and the host country has strengthened security during the conference. [Dong Ning]
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![Concerns about safety and security linger in the background of UN climate talks in Cancun, Mexico, and the host country has strengthened security during the conference. [Dong Ning]](http://images.china.cn/attachement/jpg/site1007/20101203/001372a9a93f0e6303c10d.jpg "Concerns about safety and security linger in the background of UN climate talks in Cancun, Mexico, and the host country has strengthened security during the conference. [Dong Ning]")
