What is the difference between the majority and the district judge on a classified letter?

Having examined the letter in camera and having considered its contents "including the 'sensitivity, value, and utility' of the information contained therein," the majority says that it "fail[s] to comprehend how disclosing the letter at this time could cause harm to the national defense or foreign relations of the United States." The district judge, on the other hand, "knew without hesitation or reservation that the letter could not be released" when he saw it in camera. Either way, we judges are outside of our area of expertise here. It's one thing to examine a document in camera for the existence of facts--to see, for example, whether it deals with attorney-client communications or other privileged matter. See Maricopa Audubon Soc'y v. U.S. Forest Serv., 108 F.3d 1089 (9th Cir.1997). It's a whole different kettle of fish to do what the majority has presumed to do here, to make its own evaluation of both the sensitivity of a classified document and the damage to national security that might be caused by disclosure. With all due respect, I suggest that in matters of national defense and foreign policy, the court should be very leery of substituting its own geopolitical judgment for that of career diplomats whose assessments have not been refuted in any way.