"For the past week I have been with US Secretary of State John Kerry in Switzerland in the marathon search for a nuclear deal with Iran," writes AFP photographer Brendan Smialowski. "Covering negotiations like these is as much about official photo ops as behind-the-scenes moments and features. As the negotiations dragged on, the ops got fewer and fewer, then dried up completely. But a photojournalist can go hunting for other moments to illustrate the story."