MARK VERSTEGEN, founder and president of Athletes' Performance, is a widely sought-after performance coach, consultant, and motivational speaker who resides in Scottsdale, Arizona. PETE WILLIAMS is a veteran journalist who writes about fitness, business, and sports. He lives in Safety Harbor, Florida.
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Allan Pinkerton (1819-1884), a Scotsman by birth and a barrel-maker by trade, settled in Chicago in its infancy and founded the Pinkertons, the world's first detective agency. Though events associated with the agency after his death have tarnished the nam... SEE MORE