In this photo released by UNICEF regional office in Bangkok, Jackie Chan, center, and the children play during the filming of the public service announcement on bird flu at Sha Tin Junior School, Hong Kong on May 9, 2006. World famous actor and martial arts expert Chan, stars in a one-minute new television public service announcement to alert children and their families around the world to the dangers of highly pathogenic avian influenza, or bird flu. [AP]