According to the earlier Equilar study, the amount that Fortune 100 companies spent on security for their top execs more than doubled to about $85,000 in 2010 from $40,000 in 2009.
Deere & Co., which requires CEO Samuel Allen to use company aircraft for all travel, makes note of the company's "geographic location in the Midwest, outside of a major metropolitan area," which "makes personal and business travel challenging." Deere is headquartered in Moline, Ill.
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