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

🇺🇸 84-0129 - Gates C-21A - United States Air Force SPAR822 - 3.2 mi away @ 23075 ft, heading WNW at 407 mph. Spotted 6x before! [04:15:01 PM CST] #AE0178 #reg_840129 #LJ35 #SPAR822 #military #ADSB #ADSBbot