We know that the NSA has generally stayed some years, perhaps a decade or two, ahead of public knowledge. Why not other agencies? Granted, physical objects and

We know that the NSA has generally stayed some years, perhaps a decade or two, ahead of public knowledge. Why not other agencies? Granted, physical objects and manufacturing are harder to keep under wraps than papers and bytes. It seems to me that the situation, rather than being either "sensor glitches" or extremely advanced tech, could be a combination. Tech that's a few years ahead, observed under poor conditions.