Gerard Depardieu receives a Russian passport from President Vladimir Putin
Russian President Vladimir Putin (R) greets French actor Gerard Depardieu during their meeting in Putin's residence in Sochi on January 5, 2013. Putin earlier granted citizenship to Depardieu after the French movie star said he was quitting his homeland to avoid paying a new millionaires' tax. (AFP/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.