Al pretty much nails it. This story, while tragic, would have easily run its course but the security failure, lack of disclosure and misdirection to a video are the key issues at hand. It doesn't help that as more information comes out - every outright lie from the administration get's exposed for what it is.
Even worse than Benghazi was the Taliban attack in Afghanistan that occurred 2 days after 9/11 this year in the Worse Loss of US Aircraft Since Vietnam
No one even blinked an eye on that attack.