Sigurdur “Siggi” Thordarson served two masters, working for the secret-spilling website and simultaneously spilling its secrets to the U.S. government in exchange for $5,000. On an August workday in 2011, a cherubic 18-year-old Icelandic man named Sigurdur “Siggi” Thordarson walked through the stately doors of the U.S. embassy in Reykjavík, his jacket pocket concealing his calling card: a crumpled
