Iran has outwitted U.S. and British efforts to keep it from acquiring a superfast powerboat that could be loaded with high explosives and used in a suicidal attack against one of the huge U.S. aircraft carriers deployed to the Persian Gulf. Unidentified intelligence sources quoted in published reports say Tehran's Islamic regime managed to acquire the Bradstone Challenger, a 15-metre-long craft designed especially for sustained high speeds, early last year. While naval analysts differ over whether a serious threat exists from so-called swarm attacks by such fast small boats against larger, less-manoeuvrable warships, fears that the rulers in Tehran wanted...