Boeing's fleet of 8 corporate jets spent some 4,500 hours in the sky flying company executives last year, data shows

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• Boeing executives regularly use the company's eight private planes for business and personal travel.
• The fleet's 1,800 flights last year amounted to about $14 million in fuel and 22,500 tons of CO2.
• Boeing says its CEO is "required to use company aircraft for all business and personal travel for security reasons."

Boeing's top executives...