Most of Northwest Boeing 747 fleet was sent to Delta which had retired all of its own 747s before the merger.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Most of Northwest Boeing 747 fleet was sent to Delta which had retired all of its own 747s before the merger. ### Response: .