Donald Rumsfeld served as the Secretary of Defense under two different Presidents. During his second stint in 2001, he wrote a memo to the President, “I ran across this piece on the difficulty of predicting the future, written by one of the folks here at the Pentagon, Lin Wells. I thought you might find it interesting.”
This was written and sent to the President 5 months prior 9/11/2001.
-Paul R. Rossi, CFA