Enlarge / Eric Rosenbach, who served as the chief of staff to the secretary of defense from 2015 until 2017, seen here in 2014. (credit: Center for Strategic & International Studies)
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Enlarge / Eric Rosenbach, who served as the chief of staff to the secretary of defense from 2015 until 2017, seen here in 2014. (credit: Center for Strategic & International Studies)
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