Children play in a slum area in Port-au-Prince

Children play in a slum area in Port-au-Prince December 17, 2012. U.N. Secretary-General Ban Ki-moon launched a $2.2 billion initiative to stamp out cholera over the next decade in impoverished Haiti, where an epidemic has killed thousands of people and been blamed on U.N. peacekeepers. REUTERS/Swoan Parker (HAITI – Tags: ENVIRONMENT HEALTH SOCIETY)