WHO AND HOW MANY???

Huge Ego Hewitt also had retired Gen. Jack Keane on his show and just like Kagan, Keane couldn't tell Hewitt the answer to the question, "how many":

HH: General, what do you estimate the size of the enemy to be, if we just talk about al Qaeda in Iraq at this point?
JK: There’s nobody that can give you a straight answer about that. I’ve asked that question since the ’03 timeframe. I think most people seem to think that the al Qaeda numbers, you know, in the low thousands, and the Sunni insurgency is always numbered in the tens of thousands.

Keane mentioned someting that usually doesn't get much coverage here:

One of the challenges that remains in Iraq on the security side is with the Jaish al Mahdi, which is the extreme Shiia militia group, and they are actually killing more of the U.S. forces and maiming them than any other group to include al Qaeda or Sunni insurgents.

I had thought that either Al Qaeda or the Sunni insurgents would be the top group.