In which city does this annual convention (first occurred in June 1993) that Iftach Ian Amit founded take place ?
Iftach Ian Amit:  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. DEF CON: 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.
Las Vegas, Nevada