Original sentence: Before negotiating the JCPOA, he was Program Director for Middle East and North Africa at the International Crisis Group and Assistant to National Security Advisor Sandy Berger (1996–1998) and the Director for Democracy, Human Rights and Humanitarian Affairs at the National Security Council (1994–1996)
Edited sentence: Before negotiating the historic JCPOA, he was Program Director for Middle East and North Africa at the International Crisis Group and Assistant to National Security Advisor Sandy Berger (1996–1998) and the Director for Democracy, Human Rights and Humanitarian Affairs at the National Security Council (1994–1996)