The United States and Iran have held their highest-level official diplomatic meeting in decades to discuss Iran’s disputed nuclear program. Secretary of State John Kerry and his Iranian counterpart joined diplomats from several other countries on the sidelines of the U.N. General Assembly. EU foreign policy chief Catherine Ashton said the group agreed to meet again in Geneva next month. John Kerry called the meeting “constructive” and said he and Iranian Foreign Minister Mohammad Javad Zarif also held their own meeting on the side.

John Kerry: “We’ve agreed to try to continue a process that we’ll try to make concrete and find a way to answer the questions that people have about Iran’s nuclear program. Needless to say, one meeting and a change in tone, which was welcome, doesn’t answer those questions yet, and there’s a lot of work to be done.”