What is Douglas Mackiernan's real name?
Douglas Mackiernan's real name is Douglas Seymour Mackiernan.
Douglas Seymour Mackiernan (April 25, 1913 – April 29, 1950) was an American intelligence officer and spy known for being the first officer of the Central Intelligence Agency (CIA) to be killed in the line of duty.
Source: Wikipedia: Douglas Mackiernan
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