1. IWO to Harry S. Truman about "I Am An American Day," Pledge of Allegiance, May 1945 Collection: International Workers’ Order (IWO) and Jewish People's Fraternal Order (JPFO) Set: Visual Location: Washington, District of Columbia, United States New York, New York, United States Date: 1945-05-20 Format: Image Creator: International Workers Order (IWO) Recipient: Truman, Harry S., 1884-1972 Organization: International Workers Order