President Gamal Abdel Nasser uses microphone to speak to huge crowd at one of the stops back to Cairo to Alexandria, July 28, 1956, where he announced Egypt's nationalization of the Suez Canal. Britain seized Egyptian assets in England and set up a three-power conference with the U.S. and France on further steps to deal with Nasser's nationalization of the canal. Nasser warned that foreign interference may cause obstruction to navigation on the vital waterway. (AP Photo)