As a Coalition (Australian) member at the COIN CFE I was not 'allowed' (not by US COIN CFE staff) but by the the TF doing the business advice at our centre to the incoming Bde to sit in on the briefings.

Albeit I had a higher clearance than many of the US guys in the room and had already been briefed on the capability before arriving at Taji.

one of those things I guess....