Foreign News: Death Underground

When the first section of Madrid's subway system was built 20 years ago, it was roundly damned by some Madrilenos as a piece of unnecessary civic pride in a city that could not afford it. During the past year and a half the subway had paid for itself many times over by serving as a bombproof shelter in whose underground platforms thousands of people took shelter from aerial bombs and high explosive shells. In one moment last week however Madrid's subway brought death to a substantial fraction of those it had saved.

At 7...