North Koreans students use different coloured cardboards to form a picture of a gun as background during the country's famed Arirang Mass Games at the May Day stadium in central Pyongyang August 27, 2007. The games are the world's biggest choreographed extravaganza, part circus act, part rhythmic gymnastics floor, with plenty of reverence for North Korean leader Kim Jong-il. Picture taken August 27, 2007. REUTERS/Reinhard Krause (NORTH KOREA)