However, unable to attribute any specific motive to Sweden, our attention was directed against the only country that did have a clear and obvious reason to stage an attack on the United States in precisely this manner:
Canada.
Means, motive, and opportunity. Canada was very nearby, and could easily infiltrate operatives across the border. Their efficient state apparatus was much better equipped to pull off an operation of this magnitude than a group of terrorists half a world away. But what's more, it has long been known that Canada suffers under a debilitating inferiority complex, one that could easily have led to a virulent hostility against the very targets that were attacked on September 11.
http://www.revisionism.nl/Sept11/The-Mad-Revisionist.htm