Members of the Rotary International Convention 2012 gather to form the world's biggest smiley in Bangkok May 7. The number of participants is a reflection of the convention year, and the year Rotary reached its $200 million fundraising challenge for polio eradication. Rotary International Convention's concept of "The Land of Thousand Smiles" in order to convey in friendliness of the Thais and being the land of smile as well as to express Thailand's hospitality in welcoming participants from the four corners of the world.