Barack Obama calls for a 'new era of engagement' in his first speech to the UN General Assembly

U.S. President Barack Obama will chair an historic meeting of the United Nations Security Council today that's expected to ask nations with nuclear weapons to scrap their arsenals. It will be the first time a U.S. president has chaired a Security Council summit since the panel was established in 1946. Obama addressed the UN General Assembly on Wednesday, at the opening of its 64th session. His call for a "new era of engagement" preceded speeches by Libyan leader Muammar Gaddafi and Iranian President Machmud Achmadinejad. +++MAZ+++