The murderous bomb blasts on Madrid’s trains March 11 may not have been the first attempts to sabotage Spain’s rail services. Authorities intercepted explosives and arrested suspects in December and February that were believed to be targeting the Spanish rail network. The April 3 raid that resulted in the suicides of five suspects in the March 11 bombing raises the question of how many terrorists are active in Spain, and if a serious threat remains. A letter purportedly from al Qaeda to a Spanish newspaper published April 5 threatened more attacks.