Schwarzenberg is also a regular attendant to the Trilateral Commission and the Bilderberg meetings. They further agreed to establish a Trilateral Joint Commission. In the hours following the crash, a meeting was convened of the Trilateral Contact Group. The base of a pyramid can be trilateral, quadrilateral, or of any polygon shape. Brzezinski was the primary organizer of The Trilateral Commission. Miliband is a member of the Trilateral Commission, founded and chaired by David Rockefeller. Blumenthal first met Carter in 1975 at a meeting of the Trilateral Commission in Japan. He was the Founding European Chairman of the Trilateral Commission. Estonia co-operates with Latvia and Lithuania in several trilateral Baltic defence co-operation initiatives. Robinson was a member of the European members of the Trilateral Commission. He was North American Chairman of the Trilateral Commission. Vance was a member of the Trilateral Commission. O'Brien has been a member of the Trilateral Commission. According to the 2018 membership list, Ignatius is a member of the Trilateral Commission. On David Rockefeller's endorsement he was named to the Trilateral Commission in April 1973.