Vladimir Petrovsky (left), former Director-General of the UN in Geneva and President of the Disarmament Conference, speaks at a ceremony to dedicate the completed restoration project of the Peace Window by Marc Chagall, which was installed at the United Nations in honour of Dag Hammarskjöld in 1964. Next to him is Shashi Tharoor, Under-Secretary-General for Communications and Public Information. The ceremony was part of the events held today to mark the 60th anniversary of the United Nations.