Even as Iran’s Foreign Minister Javad Zarif and his negotiating team were boarding a plane to depart Lausanne, Switzerland, on Thursday, after announcing a major development in talks over the Islamic Republic’s nuclear program, some Iranians had already taken to the streets to celebrate. Zarif had just unveiled an agreement with the U.S., European Union, Russia and China that aimed to open a path toward a final nuclear deal after grueling nine-day negotiations and 18 months of talks. A small group of Tehran citizens had gathered in front of the Foreign Ministry to show their appreciation of Zarif, and on Vali-Asr Street, one of the capital’s main thoroughfares, spontaneous celebrations were held long into the night.