Green Flag in August 1991 saw participation of these tiny Cessna's Dragon Flies. This airframe became surplus with the US Air Force and was sold to Peru as ? in December 1996. On the picture it was still assigned to the 169th Tactical Air Support Squadron (TASS) of the Illinois Air National Guard, and tasked with the Forward Air Control mission. In 1992 the OA-37B was retired from the mission and the squadron received F-16A/Bs. The TASS became a FS (Fighter squadron. Since 1995, thee 169th is flying C-130s as 169th Airlift Squadron.