Barbados president urges hemispheric unity at Inter-American Defense College graduationWASHINGTON, D.C., : Military officers, national police personnel, civilian officials, and government representatives from 19 countries across the Americas graduated from the Inter-American Defense College (IADC) on Friday, June 12, during a commencement ceremony held in the Hall of the Americas at the headquarters of the Organization of American States (OAS).