Few pause to think that their phones can be transformed into surveillance devices, with someone thousands of miles away silently extracting their messages, photos and location, activating their microphone to record them in real time. Such are the capabilities of Pegasus, the spyware manufactured by NSO Group, the Israeli purveyor of weapons of mass surveillance. The Guardian will be revealing the identities of many innocent people who have been identified as candidates for possible surveillance by NSO clients in a massive leak of data. Without forensics on their devices, we cannot know whether governments successfully targeted these people. But the presence of their names on this list indicates the lengths to which governments may go to spy on critics, rivals and opponents. Journalists across the world were selected as potential targets by these clients prior to a possible hack using NSO surveillance tools. People whose phone numbers appear in the leak ... include lawyers, human rights defenders, religious figures, academics, businesspeople, diplomats, senior government officials and heads of state. One phone that has contained signs of Pegasus activity belonged to our esteemed Mexican colleague Carmen Aristegui, whose number was in the data leak and who was targeted following her expos© of a corruption scandal involving her country's former president Enrique Pe±a Nieto. At least four of her journalist colleagues appear in the leak