Question: In which city does this annual convention (first occurred in June 1993) that Iftach Ian Amit founded take place ?
Sentence (from "DEF CON"): The event consists of several tracks of speakers about computer- and hacking-related subjects, as well as social events Wargames and contests in everything from creating the longest Wi-Fi connection (aircrack-ng) and hacking computer systems to who can most effectively cool a beer in the Nevada heat.
Relevant evidence: No