Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 86-0377 - Gates C-21A - United States Air Force SPAR704 - 3.3 mi away @ 16250 ft, heading E at 446 mph. Spotted 5x before! [12:44:26 AM CDT] #AE01A4 #reg_860377 #LJ35 #SIERRA_PACIFIC #SPAR704 #military #ADSB #ADSBbot