GCL3345401: HARRY S. TRUMAN (1884-1972). 33rd President of the United States. The assassination attempt on President Truman at Blair House, Washington, D.C., 1 November 1950. Oscar Collazo, one of two members of the Puerto Rican Nationalist Party who attempted to storm the Blair House, is loaded onto an ambulance, seriously wounded. / Bridgeman Images