Photographers take photos of the ritual of a Thai red-shirted demonstrator before he pours blood on the footpath in front of the ruling Democrat Party's headquarters in Bangkok, capital of Thailand, March 16, 2010. The Thai anti-government group here on Tuesday poured the blood donated earlier the day by the "red-shirts", who are staging a mass rally in an effort to topple the government.[Lui Siu Wai/Xinhua]