"Military bases are NOT embassys. I can asssure you from all the US military bases in Europe there is NOT a single one that is souvereign territory of the US of A. Where do you get the information that it is anything but different with the Bagram base? Did you read the SOFA agrrement between US and Afghanistan? Maybe you just mixing up souvereign territory with jurisdiction over military personnel?"
If the US recognizes Afghanistan's sovereignty over Bagram, then the US would have had no legal right to hold Afghan citizens in its huge Bagram prison. But just 2 months ago, after much contentious international pow-wow, the U.S. had, in fact, turned over "sovereignty" of the Bagram prison complex to Afghanistan. Irrespective of its SOFA agreement on paper, because the country is an active war zone, the U.S. does not treat, nor recognize the rest of the base as being under any Afghan jurisdiction. It can be compared to Guantanamo Base in Cuba. The U.S. makes lease payments to Cuba, but does not recognize Cuban sovereignty, no matter what international law or protocol stipulates otherwise.
Access by Afghanistan authorities to Bagram base is by invitation ONLY, in any matters.