🇺🇸 84-0137 - Gates C-21A - United States Air Force SPAR251 - 4.3 mi away @ 22900 ft, heading WNW at 360 mph. Spotted 21x before. [07:24:53 AM CDT] #AE0197 #reg_840137 #LJ35 #SIERRA_PACIFIC #SPAR251 #military #ADSB #ADSBbot