A sign is seen on the wall outside of a Microsoft store in the Dadeland Mall as Microsoft announces it will be buying Nokia Corp.'s line-up of smart phones on September 3, 2013 in Miami, Florida. The proposed price that Microsoft is paying is reported to be $5 billion for the Nokia unit that makes mobile phones, including its line of Lumia smart phones, and another $2.2 billion will be paid for a 10-year license to use Nokia's patents. (Getty Images)
From underwater mining to luxury yachts, Mohammed Al Barwani has interests in a staggering range of industries. The chairman of MB Holding explains how he built the firm from scratch to become a billion-dollar player.