“The Secretary of Defense shall have placed in the Trophy Hall of the Memorial Amphitheater at Arlington National Cemetery a memorial plaque which shall bear the following inscription: ‘The people of the United States of America pay tribute to those members of the Armed Forces of the United States who served honorably in Southeast Asia during the Vietnam conflict.’. To further honor those members of the Armed Forces who lost their lives in hostile action in Southeast Asia during the Vietnam conflict, the Secretary of Defense shall have placed near such plaque in a suitable repository a display of the Purple Heart Medal and other medals, ribbons, and decorations associated with service in Southeast Asia during the Vietnam conflict.”