Rail system exposed to terrorists, experts say

WASHINGTON – An alleged al Qaeda-backed plot to derail a U.S. passenger train in Canada sought to exploit the vulnerabilities of railroads that have not gotten much attention from the American public.

While the United States has sharply tightened security around airlines since the September 11, 2001, attacks, trains are far harder to police, with masses of passengers getting on and off and stops at many stations on a single line. Thousands of miles of track, bridges and tunnels present a major challenge to monitor.

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