The 486th Flight Test Squadron is not what it seems. In fact, that's literally their motto. They run secret, classified missions and are used as quick-reaction transportation by alphabet agencies, mostly FEMA. They are spy planes, with a plain white finish and no real distinct markings.
It's strange for this many to be on the move when they are supposed to be on call 24/7 for the department of defense, special ops in the state department, CIA, or foreign emergency support team
These are the planes that have been known to hold association One is at their home base in Eeglin (FL), one flew to DC and is now on the way to Costa Rica, another is in NC after a morning trip to southern AZ, and the last tracked craft has recently landed in DC Worth noting: the callsign on the bird that landed in DC first this morning is BULLA76
There is also a plain flying over Virginia/DC with the callsign "LURCH76" (with no registration, specifications or anything else available about it & a C-17A with the callsign "RCH376".
Aside from "1776" does 76 hold any other known meaning?
Another odd one that I wasn't sure if it held any meaning or not was a reconnaissance plane (can't remember the exact model) with the callsign "SOONR88" flying over DC a bit ago.