Osama bin Laden's Legacy: 13 Years of Terrorist Attacks

The Madrid Attacks
One hundred ninety-one people died and nearly 2,000 were wounded in the March 11, 2004, bombings at Madrid's Atocha train station, in which 10 bombs on four commuter trains were all detonated at about 7:40 a.m. It quickly came to light that an al-Qaeda-influenced cell was to blame; less then a month later, a group of the militants chose to blow themselves up in a Spanish apartment complex rather than be caught by the police forces closing in on them.

• Inside Osama bin Laden's Pakistan Hideaway