terrorist officials said MTA plans to spend more money hiring an additional 200 traffic police officers and 260 bridge and tunnel security personnel, equipping subway train crews and engineers with gas or chemical masks. More than 4 million people use subway and buses daily in the city's five boroughs. The underwater tunnels are interconnected and explosions breaching one of them could cause massive floodings and high casualties, the News said. The September 11 attacks against the World Trade Center killed more than 2,700 people. ---SP 2330 Local Time 2030 GMT