Paveway IIs were used to systematically destroy hardened shelters, one by one. Some shelters had aircraft within them. When the majority of shelters had been demolished, entrances to the shelters were targeted, then the intersections with taxiways, and then finally PW IIs cratered the runways at regular intervals. All these DMPIs contributed to a systematic OCA campaign, which followed an Air Interdiction phase targeting bridges on the Tigris and Euphrates, and numerous POL sites. The RAF's employment of JP 233 was criticised heavily by the US authorities, particularly because of the heavy losses incurred. Buccaneers and Pavespike were deployed at very short notice (36 hrs notice) having been told just the day before by a UK 3 star that their services would not be required on Granby. The US changed the minds of the RAF's senior ranks overnight and 'encouraged' them to deploy their only PGM capability into theatre.