In a June 24, 1947 ceremony on the White House lawn, President Harry S. Truman awarded the International Harmon Trophy to Major Alexander P. de Seversky. The Ligue Internationale des Aviateurs awarded the trophy to de Seversky for "outstanding leadership, patriotism, and unselfish devotion to the security and aeronautical progress of the United States." From left to right: Mrs. Evelyn de Seversky, Major Alexander de Seversky, Secretary of War Robert Patterson, and President Harry S. Truman.