I had posted this information before but given the circumstances - I thought I'd mention it again. Rumsfeld's words presented as poetry.
This was my favorite:
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.
But there are also unknown unknowns,
The ones we don't know
We don't know.
Department of Defense news briefing
Feb. 12, 2002
It has also been set to music. (You really have to listen to this!)
You can buy a CD of his words to music at the above link.