The first measures to counter terrorism were adopted in the 1960s and 1970s to deal with the first attacks that Europe suffered during that period, which led the first nine countries of the former European Economic Community (ECC) to become aware of their individual vulnerability to the new risks. However, it was the terrorist attacks of the 11th of September 2001 which triggered a collective reaction that led to the approval in a few days of the measures that had been blocked for years. This incident promoted the creation of a new legal framework to strengthen international cooperation in criminal matters within the European Union (EU). As a consequence, on the 13th of June 2002, the Council of the European Union adopted the decision on the European Arrest Warrants (EAW) and the surrender procedures between Member States which entered into force in 2004.