SKYWATCH INCIDENT REPORT PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON Date: 20:35 07/05/2024 Callsign: AAL1913 Origin: ORD Status: Closed Aircraft: A321 Destination: PHX POD: DEN Tail Number: New Destination: Reporting Facility: ZKC Operator: AAL Operator Type: Commercial Paged: YES REMARKS Aircraft reported an unidentified aerial phenomenon off the front side while W bound at FL 260, 40 NM N of FOE. PIC reports receiving a TCAS RA and saw a flight of 2 followed by a single aircraft, all slow moving, opposite direction at FL 300, light grey in color. PIC could not discern type of aircraft or provide more description. UAL1687 also reports receiving a TCAS RA in that area but did not acquire traffic visually. There were no primary or secondary radar returns depicted on ATC facility radar. Western Air Defense reports no aircraft in vicinity. 2119 UPDATE: 5 more aircraft reported seeing traffic in close proximity on TCAS in the vicinity of Fort Riley, KS. Negative visual contact. No know GPS testing in that area. No corresponding traffic depicted on radar. SKYWATCH INCIDENT REPORT | DATE: 2024-07-05T20:35 | POD: DEN | PAGE 1 of 1