In the winter of '95 I flew in support of Operation Nomad Vigil which included Predator operations from Albania monitoring the former Yugoslavia. We spent nearly 20 days running constant C-130's into Gjader AB to pack up the Predators and their gear and relocate them to Hungary. I recall Gjader was a "MOG of 1" (max on ground, one airplane) so scheduling and timing was key, as you'd have to orbit until the previous guy taxied out and got airborne. I would have thought it was classified, but we were told that the then-new Predators needed publicity.
I walked around and took a few MiG photos and heard that there were hidden bunkers, but had no idea they were this advanced.
The link has some amazing photos:
http://www.urbanghostsmedia.com/2014/05 ... nd-hangar/