In Iran, there are those still bravely speaking out on issues of human rights, democracy and women's equality. One of these is Narges Mohammadi, a Nobel Peace Laureate who has now been imprisoned for the better part of 20 years. The state accuses her of acting against national security, yet she continues to be a voice for freedom at great personal risk and sacrifice. While out on temporary medical leave, Mohammadi has made the extraordinary decision to speak to Christiane Amanpour with her message to the world, in a world exclusive interview.