Many of the attendees at this year's DEF CON hacker conference brought their own sense of style to Las Vegas. "You break down into one of a couple different groups: black T-shirt, steampunk, cyberpunk, and then business casual," said an attendee who called himself Puddin. "Black T-shirt is hacker 101."
The hacker fashion extended to laptops graffitied with stickers to purple and green mohawks. Here, a hair stylist named Lexi worked on Ethan's hair at the DEF CON mohawk station.