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

🇺🇸 86-0374 - Gates C-21A - United States Air Force SPAR820 - 3.6 mi away @ 25375 ft, heading WNW at 392 mph. Spotted 4x before! [01:41:18 PM CST] #AE01A1 #reg_860374 #LJ35 #SIERRA_PACIFIC #SPAR820 #military #ADSB #ADSBbot