I usually have a monitor with the ADS-B tracking up in my work shed. Lots of military aircraft flying over and I like to see whats out there.
About a week ago at about 7:30pm when it was dark, a low-flying jet went overhead. I was outside and saw that it had no nav lights on at all, was flying dark. I couldn't make out exactly what it was, but from the sound, I think it was an F-22. I looked at my ADS-B display and there was an "unknown" type aircraft moving at 400 Kts at about 2500 feet. It had just appeared on the ATS-B tracking site moments earlier in an outlying area. There was another unknown type that appeared to the west about 50 miles, same altitude and airspeed. Both circled to the north and came in and landed at Ft. Worth Joint reserve base (old Carswell AFB).
Friday at about 8pm I noticed about a dozen unknown aircraft all around the greater DFW area all with similar airspeed and altitudes. They all disappeared off the tracking at the same time, not anywhere near airfields. I also have noticed the last 2 weeks that there has been alot of EAM (Emergency Action Messages) being broadcast on the Air Combat Command frequencies in my scanner. This has been a first hearing them on those frequencies and not just on the shortwave frequencies.
Not sure if any of this is related, but something is definitely up.