A Delta Air Lines flight DL4240 from Fort Wayne (FWA) to Minneapolis (MSP) declared an emergency (squawk 7700) and diverted to La Crosse (LSE) due to a possible pressurisation issue. An aircraft involved, Mitsubishi CRJ-200LR, registration N447SW, has no other record in our database at the time of publication. Courtesy of Flightradar24.com