He served on the board of directors for American Airlines , March & McLennan , Chicago Title and Trust Company , and Metropolitan Life Insurance Company .
When he left the Department of Defense , Douglas once again returned to his law practice in Chicago .
Douglas served on the board of directors for American Airlines , March & McLennan , Chicago Title and Trust Company , and Metropolitan Life Insurance Company .
When he left the Department of Defense , Douglas once again returned to his law practice in Chicago .