I have been looking at the write-ups on the bombing in Mosul and since no one has touched on it yet I thought I'd throw this question out there:

What if it turns out that the bomber was a member of the Iraqi National Guard?

I ask because early reports are so confusing that they inexplicably seemed to suggest that it was some random Iraqi who wandered onto base and somehow passed through several layers of security without raising suspicion.  Since this is a joint US-Iraqi military base and mess hall and we've heard untold numbers of reports on the unreliability of Iraqi National Guard and other security forces the probability it was ING rises significantly.  Now I'm perfectly willing to concede it might have just been a local who worked at the base but you'd think that someone reporting on this mess might actually raise the question.