A fireman walks past Central World shopping mall which was set ablaze by anti-government "red shirt" supporters after the military penetrated their encampment in Bangkok May 19, 2010. Rioting and fires swept Bangkok on Wednesday after troops stormed a protest encampment, forcing protest leaders to surrender but sparking clashes that killed at least six and triggering unrest in northern Thailand. A night curfew has been declared in Bangkok and 21 provinces. [Xinhua photo]