Bush Approves Using 9/11 Aid For J.F.K. Link
Bush administration agrees to let New York use $2 billion in 9/11 aid to help build $6 billion rail link connecting World Trade Center site to Long Island Rail Road and Kennedy International Airport; decision is huge boost for Gov George E Pataki's efforts to get direct rail connection from Manhattan to airport; advocates for downtown say putting link at World Trade Center site would significantly enhance Lower Manhattan's efforts to attract new business and recover economically from terror attack; money will come from unused portion of multibillion-dollar tax-incentive package to help spur redevelopment of Lower Manhattan after 9/11; rail plan must still be approved by Congress; project is expected to be completed in 2013; detailed description of project; map (M)