The devastating events of Sept. 11 have prompted the Navy to postpone indefinitely a biennial symposium that has for years brought together naval leaders from around the world to discuss maritime issues with political, economic and security-related implications. Chief of Naval Operations Adm. Vern Clark had been planning to host representatives of foreign navies at the 16th International Seapower Symposium during the last three days of October at the Naval War College in Newport, RI. But the deadly terrorist attacks...