21 There are currently four E-6B Mercury "Airborn Command and Control" planes over CON US right now. (globe.adsbexchange.com) posted 3 years ago by _Donald-Trump_ 3 years ago by _Donald-Trump_ +21 / -0 12 comments share 12 comments share save hide report block hide replies
These are almost always in the sky. But 4 does seem a little high. Almost always see at least 1 with the adsb on.