Army Maj . Steven Smith , 60 , becomes oldest American killed in Iraq . He retired after 22-year military career , volunteered to return years later . `` He had a big heart . '' Psychology professor served tours in Vietnam , Afghanistan and Iraq . During Iraq , he helped by wife during her fight against cancer .
Army Maj . Steven Smith , 60 , becomes oldest American killed in Iraq . He retired after 22-year military career , volunteered to return years later . Psychology professor served tours in Vietnam , Afghanistan and Iraq . During Iraq , he helped by wife during her fight against cancer .