July 29th, 2011
06:06 PM GMT
CNN has spent the past eight months trekking continents searching for the secrets of successful CEOs.
In episode 32 of our series "The Boss", we ask what keeps a business leader awake at night?
For one – our first billionaire CEO, who's based in Macau, the devil is in the details. And for our UK chief executive it's all about growing the brand.
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