A trial into Europe's worst-ever Islamic terrorist attack began Thursday in Spain, with 29 suspects facing charges in connection with the 2004 bombings that killed 191 rush-hour commuters in Madrid. The trial promises to be both spectacular and emotional, dredging up memories of the March 11, 2004, attacks. Some 100 experts and 600 witnesses were likely to be called. "I hope justice is rendered and that there is a worthy sentence for Europe's worst terrorist attack," Pilar Manjon, president of an association of March 11 victims, said before the proceedings got under way. She lost her 20-year-old son in the massacre.