Amazon has suspended its use of cargo carrier 21 Air after a crash at Miami International Airport on 6 September that killed five people. The pause follows Amazon's review of the circumstances alongside the ongoing National Transportation Safety Board investigation, and comes as former 21 Air employees allege the airline had a long history of ignored safety warnings and retaliated against staff who raised concerns.

Amazon will redirect shipments previously handled by 21 Air to other carriers, including Sun Country Airlines, Hawaiian Airlines, Air Transport International, ABX Air, ASL Airlines and Carojet. North Carolina-based 21 Air, which specialises in cargo flights to and from Mexico, maintains confidence in its safety policies while cooperating with investigators. Pilot Karl Seuring, who has over three decades of experience, claims he was fired after raising safety concerns and has a pending federal tribunal case; documents cited by CBS News allege complaints about faulty aircraft, inadequate crew rest and language barriers among pilots were buried by management. The Boeing 767 involved in the crash, which was on its third flight of the day, ran off the runway; both pilots, Joseph Carroll and Jaime Filipe Silva Molina, were hospitalised and later released.