Folks, when I saw this and the idea of 10 miles east at 4000feet. I thought...hmm, pretty close to the ILS glideslope altitude.
We all know about 300' per nm for glideslope.
But to be sure, I looked up the ILS apch and here it is:
http://155.178.201.160/d-tpp/1409/00237IL24L.PDF
One of many as you all know. And while not exactly on the glideslope, it is close enough to be of great concern to landing traffic.
Now, some of you will point out that 300 per nm would make the glide at 3000'. but it is really closer to 316 per nm. And , while not the best way, most plane intercept from above the glideslope.
This should be considered a serious incident. I just hope ISIS doesn't get a drone.