DASHED hopes of an imminent revival in the tech sector and new violence in the Middle East sent Wall Street tumbling. The Dow Jones Industrial Average dropped 144.55 points or 1.49% to 9561.57, its lowest levels of the year. The Nasdaq Index plunged 46.13 points or 2.99% to 1496.83, 200 points below where it stood on 10 September, the day before the terrorist attacks on New York and Washington.