Rumsfeld held the distinction of serving two non-consecutive terms as head of the Defense Department, first under President Gerald Ford and then, a quarter-century later, under President George W. Bush.
He was the person who dazzled reporters when in a media conference told the reporters "something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say, we know there are some things we do not know."
Our world affairs correspondent Roland Bidzhamov, reports on the events during Rumsfeld's time in office.
