William James Perry ( born October 11 , 1927 ) is an American mathematician , engineer , and businessman who was the United States Secretary of Defense from February 3 , 1994 , to January 23 , 1997 , under President Bill Clinton .
William James Perry ( born October 11 , 1927 ) is an American mathematician , engineer , and businessman . He was the United States Secretary of Defense from February 3 , 1994 , to January 23 , 1997 , under President Bill Clinton .