translate English to French: By showing images of hostages being killed, the terrorists quickly capture the public's attention and produce a psychological impact even before the news of terrorists' violent actions is picked up by the media and the rumour mill and relayed through the infosphere.
En disséminant les images du meurtre de leurs otages sur Internet, les terroristes attirent rapidement l'attention du public et provoquent un effet psychologique avant même que leurs actions violentes soient reprises et transmises à travers l'infosphère.