Since the beginning of 2014, representatives from Israel and Saudi Arabia have had five secret meetings to discuss a common foe, Iran. On Thursday, the two countries came out of the closet by revealing this covert diplomacy at the Council on Foreign Relations in Washington.

Among those who follow the Middle East closely, it’s been an open secret that Israel and Saudi Arabia have a common interest in thwarting Iran. But until Thursday, actual diplomacy between the two was never officially acknowledged. Saudi Arabia still doesn’t recognize Israel’s right to exist. Israel has yet to accept a Saudi-initiated peace offer to create a Palestinian state.

It was not a typical Washington think-tank event. No questions were taken from the audience. After an introduction, there was a speech in Arabic from Anwar Majed Eshki, a retired Saudi general and ex-adviser to Prince Bandar bin Sultan, the former Saudi ambassador to the U.S. Then Dore Gold, a former Israeli ambassador to the United Nations who is slotted to be the next director general of Israel’s foreign ministry, gave a speech in English.