Alexander Butterfield

Alexander Porter Butterfield (born April 6, 1926) is a U.S. military officer, public servant, and businessman. He served as the deputy assistant to President Richard Nixon from 1969 to 1973.
Butterfield revealed the existence of the White House taping system on July 13, 1973, during the Watergate scandal investigation, but had no involvement in the scandal. From 1973 to 1975, he served as administrator of the Federal Aviation Administration.