New York city commuters may be riding more crowded subway trains for quite a while. One of the city's busiest lines has been taken out of service, and another is being severely limited, after a weekend fire in an equipment room caused millions of dollars in damage. The C line runs through Manhattan, Brooklyn and Queens, and officials say it's shut down indefinitely. They also say there will be "significant delays" on the A line, which runs parallel to the C line for much of its route and extends to JFK Airport. The Metropolitan Transport Authority says it could take a few years to return the lines to full service.