Question: In which city does this annual convention (first occurred in June 1993) that Iftach Ian Amit founded take place ?

Related documents: [0]  [DOC] DEF CON (also written as DEFCON, Defcon, or DC) is one of the world's largest hacker conventions, held annually in Las Vegas, Nevada, with the first DEF CON taking place in June 1993. 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." 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. [END] 
[1]  [DOC] Iftach Ian Amit (Hebrew: יפתח איאן עמית) is an Israeli Hacker/computer security researcher and practitioner. He is one of the co-founders of the Tel Aviv DEF CON Group DC9723, the Penetration Testing Execution Standard, and presented at hacker conventions such as DEF CON, Black Hat, BlueHat, RSA Conference. He has been named SC Magazine's top experts and featured at Narratively's cover piece on Attack of the Superhackers and is frequently quoted and interviewed [END]  
Answer: Las Vegas, Nevada
Las Vegas, Nevada