Source:
CBC NewsCanada asked the United States to help plan against a nuclear threat during the 2010 Vancouver Olympics, plus assist in everything from mundane tasks such as mail screening to troop transportation, reveal diplomatic cables released by WikiLeaks.
"Although unlikely, Canada could potentially face the threat of an improvised or military nuclear device being constructed in, or imported to, its national territory," a Canadian diplomatic request dated June 3, 2009, says. "Canada does not currently possess the capability for the rendering safe of a nuclear device."
The Canadian note was quoted in a leaked U.S. diplomatic cable released to CBC News via whistleblower website WikiLeaks. It was one of several Olympics-related cables that detail Canada's requests ahead of the February 2010 Games and American observations of their preparations.
It's not clear from subsequent notes whether the U.S. did indeed provide the requested assistance.
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http://www.cbc.ca/news/canada/story/2011/05/06/wikileaks-vancouver-olympics-canada-us-diplomatic-cables.html