A woman cries as she holds a banner that reads "No to ETA" during a moment of silence in front of Madrid´s town hall July 31,2009. A bomb placed under a police car killed two officers on the Spanish holiday island of Mallorca on Thursday, in what authorities called the second major attack by the Basque separatist rebel group ETA in two days. REUTERS/Susana Vera (SPAIN CONFLICT POLITICS)