A foiled terror plot targeting Taylor Swift's concerts in Vienna aimed to kill tens of thousands of fans, according to CIA Deputy Director David Cohen. The CIA alerted Austrian authorities, leading to the arrests of a 19-year-old and two others linked to ISIS, who planned to attack concertgoers using knives or homemade explosives. The threat resulted in the cancellation of three sold-out shows, devastating fans who had traveled internationally to attend. The main suspect had reportedly pledged allegiance to ISIS and was found with chemical substances during a raid. Swift expressed her emotional turmoil over the cancellations and thanked authorities for averting a potential tragedy, drawing parallels to the 2017 Manchester bombing. The incident has raised discussions about the need for enhanced surveillance powers in Austria to prevent such plots.