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

🇺🇸 64-14843 - Boeing RC-135V - United States Air Force MAVRK43 - 3.4 mi away @ 20350 ft, heading W at 390 mph. Spotted for first time! [12:39:57 PM CDT] #AE01C5 #reg_6414843 #R135 #MAVRK43 #military #ADSB #ADSBbot