Page 29. IPs are the Iraqi Police, who are about as effective as you might think.
One time, we were driving back from Al Kindi to Mosul and I was in charge of the lead vehicle — one of the few times I had that job. One of the main jobs of the lead vehicle TC is to call out items of note in the road and the environment in general for the awareness of the vehicles that follow — suspicious-looking vehicles, civilians, suspicious-looking piles of rubble, suspicious-looking light poles &c. We were driving down the highway and passed an IP checkpoint; one of the policemen was just standing in the middle of the road for no good reason, staring at the moon or whatever. We swerved around him, but, not wanting him to get hit by any of the vehicles behind me, I called out:
“I P in the road!”
Everyone had a good giggle.