A protester (left) approaches Iranian President Hassan Rouhani's car as it leaves Mehrabad Airport after the leader's arrival in Tehran from the United States on Saturday, Sept. 28, 2013. (AP Photo/Ebrahim Noroozi)

Photo by: Ebrahim Noroozi

A protester (left) approaches Iranian President Hassan Rouhani's car as it leaves Mehrabad Airport after the leader's arrival in Tehran from the United States on Saturday, Sept. 28, 2013. (AP Photo/Ebrahim Noroozi)