JRTC kicks off at Fort Polk Published Jan. 13, 2020 By Tech. Sgt. David W. Carbajal 621st Contingency Response Wing FORT POLK, La. -- Members of the 321st Contingency Response Squadron helped manage inbound and outbound aircraft for exercise Joint Readiness Training Center 20-3 held at nearby Fort Polk, Louisiana. The exercise brought together members of servicemembers from the United States and members of the Royal Canadian Air Force and the Japan Ground Self-Defense Force.