After his return, he and other groups opposed to Pahlavi monarchy founded the Mojahedin of the Islamic Revolution Organization (not to be mistaken with the People’s Mojahedin Organization, which opposes the Islamic Republic). In 1980, when Prime Minister Mohammad-Ali Rajai flew to New York to attend the UN Security Council, Tajzadeh was one the 13 who accompanied him. What made this event all the more memorable was that, at the Security Council, Rajai showed reporters the scars on his feet, inflicted on him by torture under the Shah’s regime. He also delivered a fiery speech that was typed up by Tajzadeh.