DoD News: Secretary Rumsfeld Interview with Bill O'Reilly for The O'Reilly Factor:

"BILL O’REILLY:  How do we beat them?
DONALD RUMSFELD:  Oh, well, it’s a test of wills. I mean, they haven’t won a single battle the entire time since the end of, of major combat operations.
BILL O’REILLY:  [OVERLAPPING VOICES] Same thing happened in Vietnam, though, 
DONALD RUMSFELD:  [OVERLAPPING VOICES] They never, never won,
BILL O’REILLY:  They never beat us."

(Via DefenseLink.)