HALIFAX FORUM U.S. Defense Secretary Robert M. Gates addresses the audience as Canadian Minister of National Defense Peter MacKay, left, and Craig Kennedy, president of the German Marshall Fund, look on during the Halifax International Security Forum in Halifax, Nova Scotia, Nov. 20, 2009. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 542308-V-UKX23-564.jpg Photo Gallery