[Perdogg]

Yep http://www.thedailybeast.com/articles/2012/09/26/u-s-officials-knew-libya-attacks-were-work-of-al-qaeda-affiliates.html

[TigerClaws]

So the real question:

What was the political reason for blaming the film/trailer?

The administration wanted it to be spontaneous and an angry mob. That makes it random. Mid east chaos.

Planned attack means the administration dropped the ball.