In turn, many Arabs believe the Kurds will never compromise on land they occupied after Saddam's fall.Yet the two sides are co-operating well in Kirkuk, where they and the Americans jointly operate a police command-centre.
And, unlike in America, where the Central Intelligence Agency and the Federal Bureau of Investigation are still engaged in damaging turf wars, European intelligence agents are understood to have co-operated well with each other after September 11th.
Some delegates have blamed the Qatari presidency, which they say has not taken a firm grip on the talks, and the Saudi Arabian chair of one of the negotiating strands, who has been accused of not co-operating well with the negotiators.
At this time he met by chance Pierre Boulez, who was looking for an assistant to work with him on the centennial production of Wagner's Ring at Bayreuth (1976) – a person, as Tate describes it, "unconnected with the Bayreuth establishment who spoke French as well as German and would be likely to co-operate well with the producer, Patrice Chéreau".
They have co-operated well in opposition: the Islamist party has moderated its demands, so as not to scare off the Chinese and Indian supporters of the other parties, and they made good tactical choices about who should contest which seat.
Mr Cameron has co-operated well with Barack Obama on one war, in Libya, failed to gee him up for another, in Syria, and spoken remarkably little to the president in between least of all about Iraq and Afghanistan, where Britain has expended £37 billion and 632 lives.
He says his forces are co-operating well with the Ethiopian and Ugandan armies, both of which are meant to help America against Islamist fighters in Somalia.The Americans also say that it is more important that they should work harmoniously with Africa's existing regional military bodies, particularly Eastern Brigade.
"I would hope that they [the UK authorities] would say we've been co-operating well," said Cook, of the terror investigation, adding that he thought Apple had provided "some valuable information".
Dominique possesses great strength and co-operates well with Cobra, often looking the other way when her professional duties would require her to arrest him.
In fact, in areas of obvious mutual concern, such as terrorism, ASEAN does seem to co-operate well.
According to one expert, however, the biggest obstacle to tighter security is not with the front-line (where police and intelligence services now co-operate well), but with the senior civil servants and politicians who have the power.
