Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Impact of Canadian Spy Case Resonates 10 Years Later Jay Heisler HALIFAX, NOVA SCOTIA - Ten years ago, a police raid occurred in Halifax, Nova Scotia, that would permanently change the way Canada deals with national security and intelligence -- and send long-lasting ripples through its relations with major allies. It was December 2011 when Royal Canadian Mounted Police officers accompanied by military authorities raided the house of Canadian navy officer Jeffrey Delisle, acting on a tip from authorities in the United States. Within weeks, Delisle had confessed to spying for Russia. The arrest was a blow not only to Canada but also to several key allies. Delisle had been working at HMCS Trinity, a secretive intelligence facility in the Halifax naval dockyard that coordinates intelligence-sharing among a group of countries known as the Five Eyes: Canada, the United States, Britain, Australia and New Zealand. Ten years later, what has been learned? VOA talked to Canadian intelligence experts, local journalists and Canada's Department of National Defense to find out what steps were taken to prevent a recurrence. Wesley Wark, an intelligence expert and frequent contributor to the Canadian Broadcasting Corp. (CBC), said the security breach led to short-term and long-term changes that are still being felt. Security clearance Wark told VOA that immediately after Delisle was caught, the facility in which he worked was "stripped apart and rebuilt" to make sure Delisle had not left behind any listening devices or compromised any of the computers. .