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Keith B. Alexander
Keith Brian Alexander
(born December 2, 1951) is a retired four-star
general
of the
United States Army
who served as
Director
of the
National Security Agency
(DIRNSA), Chief of the
Central Security Service
(CHCSS) and Commander of the
United States Cyber Command
. He previously served as Deputy Chief of Staff, G-2, U.S. Army from 2003 to 2005. He assumed the positions of
Director, National Security Agency
and Chief,
Central Security Service
on August 1, 2005 and the additional duties as Commander,
United States Cyber Command
on May 21, 2010.
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