These newsletters come out all the damn time and are relatively easy to get signed up for these Fusion Center briefs. You can generally apply if you have at least a remote level of need for them either through physical security, or cyber security.
They're typically based on SAR (suspicious activity reporting), so they're essentially briefs and generally tip guides about things that might be happening in your state or area. All those tips that you send via tips.fbi.com or similar tend to make their way to your local fusion center. They get marked down for relevant current political climate stuff from multiple agencies, typically include thwarted terrorist events or online calls for action, and will usually training available.
While most of the info in these newsletters are For Official Use Only, there's a lot that might straight up be publicly available which can still be shared under the CUI Program. You just can't share the entire document itself since it's typically unclassified, but that doesn't mean you can share it publicly. Parts of it maybe, it'll tell you which parts you can. It's similar to Traffic Light Protocol for any CISA stuff if you get those. TLP Clear is capable of being publicly released. Everything else has some sort of limitation.
Regular old ZIP with AES-256 should do the trick for anything truly important you want to keep locked down.
You could always do sly stuff like Hidden volumes with Veracrypt as well. Leave the crumb trail for the low key shit or old nudes of gfs you have permission to keep.
So, a typical pupil is around 2 mm in diameter in bright conditions. With the Rayleigh limit that results in an angular resolution of 1.22 * 60010-9 m / 210-3 m = 3.66*10^-4 rad
At a distance of 5 x 3 mi = 15 mi = 24.1 km this corresponds to a point to point distance of
tan(a/2) = (d/2)/l
d = tan(a/2) * l * 2 = tan(3.66*10^-4) * 24100 * 2 = 8.8 m
So in conclusion, with regular, human-like eyes he could discern points that are at least 8.8 m apart in the best case scenario. Discerning hair color from the color of the clothes would need a much higher resolution, and the horsemen are probably not 10 m apart from each other either. And again, this is a theoretical limit, real-world resolution would probably be significantly lower.
