Photo taken on Nov. 29, 2015 shows the Press Conference Hall of Le Bourget where the 2015 United Nations Climate Change Conference (COP 21) will take place in Paris, France. Already at high terror alert, France planned to pour 11,000 policemen and gendarmes across the country to ensure the safety of the upcoming UN conference on climate change (COP21). (Photo: Xinhua/Zhou Lei)
