in the mountains north of tehran this past winter, i met up with a young woman i call samira. she asked to meet me here because it's one of the few places young people can go and not be spied on. samira is a rap singer and uses her music to give voice to those who cannot speak out. >> ( translated ): what i could do was write about it, what i had seen, and be the voice for the people who are dead or imprisoned. >> reporter: i first met her in the early days of the protests of 2009. she was an activist in the green movement, and had just seen a young man gunned down in the street next to her. >> ( translated ): i went to the street to demonstrate. we held back the basiji militia for two hours just by throwing stones. a man standing next to me with a mask on his face, i'd given him some stones just a few minutes before. he fell down, and blood exploded out of the middle of his forehead. i was shocked. then, somebody shouted that it was a direct shot. >> reporter: what samira saw was not unusual-- countless numbers of protesters were shot by the basiji militia. i met parvin fahim