MARITIME DEFENSE KHOR AL AMAYA OIL TERMINAL, Iraq, July 1 — The oil wealth that Iraq is counting on as its best hope for a stable future flows through rattling pipelines to lonely, rusting depots 15 miles offshore, so isolated that an armada of American, British and Australian warships is circling them to prevent the threat of waterborne suicide attackers. Even little fishing dhows that ply the waters of the Persian Gulf have been guarded against, since attackers in three boats sped toward Khor al Amaya and its larger sister terminal, Al Basra, and blew themselves up on April 24....