FORBES BUSINESSWOMAN: Ho Ching is the chief executive of Temasek Holdings, Singapore's state-owned investment company, in Singapore. She was listed as no. 3 in Forbes list of the World's 100 Most Powerful Women. Here she is seen during the dedication ceremony of unveiling of Li Ka Shing plaque and building name at the Lee Kuan School of Public Policy in Singapore, 4 September 2007. (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.