WASHINGTON (Nov. 18, 2016) Rear Adm. David J. Hahn gets assistance from his sons, Nathan, right, and Stewart, during a promotion ceremony to rear admiral upper half and prior to his change-of-command ceremony where he relieved Rear Adm. Mat Winter as the chief of naval research (CNR). Hahn, a decorated submarine commander and naval acquisition officer, will head the Office of Naval Research (ONR) and oversee the roughly $2 billion Department of the Navy budget for naval science and technology programs.

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