 On a rooftop garden high above Manhattan's Fifth Avenue, guests sip cocktails and nibble on appetizers as the setting sun kisses the buildings across the street. They are here to celebrate the 10th anniversary of Masih Alinejad's campaign against the compulsory headscarf, or hijab, in Iran. Inside, over plates of fragrant Persian food, the guests are shown a brief video in which Alinejad talks about her activism.