A police officer stands on guard at the entrance of Le Bourget where the 2015 United Nations Climate Change Conference (COP 21) will take place from Nov. 30 to Dec. 11 in Paris, France on Nov. 25, 2015. Already at high terror alert, France planned to pour 8,000 policemen and gendarmes across the country to secure the national borders and ensure the safety at home where the upcoming UN conference on climate change (COP21) is scheduled for next week, a government official said on Wednesday. (Photo: Xinhua/Zheng Bin)
