Analysis of information sources in references of the Wikipedia article "Interservice rivalry" in English language version.
During the descent, they reported seeing many firefighters who were resting and did not seem to be in the process of evacuating. They further reported advising these firefighters to evacuate, but said that at times they were not acknowledged. In the opinion of one of the ESU officers, some of these firefighters essentially refused to take orders from cops. At least one firefighter who was in the North Tower has supported that assessment, stating that he was not going to take an evacuation instruction from a cop that morning.
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