Ransomware Attack in Atlanta Puts U.S. Cities on Notice Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email One example of a ransomware attack is displayed on a computer screen when a user is infected with 'Cryptolocker.' ( Christiaan Colen / Flickr-CC ) Produced by Ellen Frankman and Rob Gunther Produced by PRI and WNYC