Delmar Simpson and Nathanael Beech were arraigned Friday at the Aberdeen Proving Ground Military Base in Maryland.

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The portable unit was delivered to the U.S. Army last August at its Aberdeen Proving Ground in Maryland.

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During World War I Loomis enlisted, becoming head of research and development at the Aberdeen Proving Ground in Maryland.

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Gaffney, Jr. at the 1992 U.S. Army Scientific Conference on Chemical Defense Research, Aberdeen Proving Ground, Maryland, 17 November 1992.

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Samuels is a Department of the Army civilian, working as a research chemist studying remote sensing technology at Edgewood Chemical Biological Center at Aberdeen Proving Ground, Maryland.

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ABERDEEN, Maryland (CNN) -- A lawyer for one of three soldiers accused of involvement in the Aberdeen Proving Ground rape scandal asked at a Friday arraignment that the judge enact a gag order on Army officials who discussed the story with the media.

CNN: Judge bars prospective jurors from following case