Question: In which city does this annual convention (first occurred in June 1993) that Iftach Ian Amit founded take place ?
Sentence (from "DEF CON"): Many of the attendees at DEF CON include computer security professionals, journalists, lawyers, federal government employees, security researchers, students, and hackers with a general interest in software, computer architecture, phone phreaking, hardware modification, and anything else that can be "hacked."
Relevant evidence: No