Conversation so far:
when did Allen Dulles start CIA?
On August 23, 1951, Allen Dulles was promoted to Deputy Director of Central Intelligence.
what did Allen Dulles do in the CIA?
Documents made public in 2004 revealed that the CIA, under Allen Dulles' orders, had broken into Joseph McCarthy's Senate office and fed disinformation to him in order to discredit him.

Question: what did he do?
Self-contained rewrite: what did Allen Dulles do?