Joint Chiefs of Staff Chairman Adm. Mike Mullen is retiring after four years overseeing the U.S. military and 40 years of military service. Kwame Holman reports on Mullen's legacy and the farewell to one of the most influential military leaders…
Army Gen. Martin Dempsey is expected to replace Adm. Mike Mullen as the chairman of the Joint Chiefs of Staff.
By News Desk
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