Given the question: - alt is john f. walker - years active is 1980 -- present - known for is known corporate security expertise for us government counterintelligence and anti-terrorism operations and - birth name is john f. walker - citizenship is american - ethnicity is scottish - birth date is 22 february 1960 - image size is 200px - nationality is american - image is johnfwalker1.jpg - birth place is walterboro , south carolina , united states - occupation is cism consultant Given the details above, guess who could this information be about.
The answer is:
john f. walker