After the Madrid March 11, 2004 terrorist attacks, the interplay of politicians, journalists and academicians created an atmosphere of collective trauma. The authors analysed data related to these attacks in a sample of the population of Madrid (N = 503) 18-25 days after the attacks. Post traumatic stress disorder (PTSD) was systematically assessed on the basis of a selfadministered interview. The data, however, shows that there is no scientific evidence at all for collective traumatization, or an epidemic of PTSD.