re: #106 zombie
It has a slightly distinctive fuselage shape. So, even though it was wayyyyyy up there, through binoculars I could make it out.
One detail, though, is that the wings seemed pretty far up near the nose, which made me think it possibly could be a B-52 Stratofortress, but I thought those were all decommissioned. 90% chance it was a C-5, 10% possibility it was a B-52. No way it was civilian.
There is no replacement for the B-52, they are still operational and will be for a long time.