"It’s an addiction. It’s not even that you want to come back. You need to come back," writes Olivier Morin, AFP's chief photo editor for France.
"Cold is like that. You become hooked, like a junkie. And this is the only reasonable place to get your high (it takes too long to get to the others). So this year, I decided to take portraits of other addicts like me. Because for once, it got really cold."