- UPS grounds all its MD-11 planes after deadly Louisville crash The Guardian
- US firms ground MD-11 cargo planes after Kentucky air disaster BBC
- Mystery bell heard during UPS cargo plane crash is investigated by NTSB The Independent
- UPS Plane That Crashed Was 34 Years Old—and Repaired in September The Wall Street Journal
- UPS, FedEx ground MD-11 fleets after deadly Louisville crash Reuters
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