This Monday, March 11, marks 20 years since the jihadist attacks on Madrid Cercanías trains. 11-M was the last major attack prior to the era of social networks and the proliferation of cell phones with cameras.

A year later, in the 7/7 attacks in London, thousands of images recorded on site by witnesses immediately reached the media. A possibility that had grown exponentially in 2017, when the attacks in Barcelona and Cambrils occurred. In this video, Carlos E. Cué, Víctor Sampedro and Amparo López Meri analyze the images and information we were able to see and share.