Harris began writing the book in what he described as a period of "collective grief and stupefaction" following the September 11, 2001 attacks.
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: Harris began writing the book in what he described as a period of "collective grief and stupefaction" following the September 11, 2001 attacks. ### Response: .