High Quality Content by WIKIPEDIA articles! The Bureau of International Organization Affairs (IO) is a bureau in the United States Department of State that creates and executes U.S. policy in the United Nations and other international organizations. It is headed by the Assistant Secretary of State for International Organization Affairs. The IO is charged with developing and implementing the policies of the U.S. government with respect to the United Nations and its affiliated agencies, as well as within certain other international organizations. The Bureau of International Organization Affairs was created in order to strengthen the United States involvement in important international relations.