article_snippet: It prompted fears of a highly-calculated terror plot.
article_snippet: Much of the speculation was linked to concern about a terrorist plot against the Games.
article_snippet: Canada has been on heightened alert for terrorist activity since a gunman attacked the Parliament Buildings in Ottawa in October after fatally shooting a soldier at the nearby National War Memorial.
article_snippet: The attack by a so-called 'lone wolf' Canadian convert to Islam came two days after another convert rammed two soldiers in Quebec with his car, killing one.