Demonstrators march during The National Day of Catalonia on September 11, 2013 in Barcelona, Spain. Thousands of Catalans celebrating the 'Diada Nacional' are holding demonstrations to demand the right to hold a self-determination referendum next year. (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.