Former Under Secretary of Defense for Intelligence
Marcel Lettre was sworn in as the fourth Under Secretary of Defense for Intelligence (USDI) in December 2015. As the USDI, Lettre was the principal intelligence advisor to the Secretary of Defense.
Marcel Lettre was sworn in as the fourth Under Secretary of Defense for Intelligence (USDI) in December 2015. As the USDI, Lettre was the principal intelligence advisor to the Secretary of Defense.
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