Al-Walid is is estimated to donate more than $100 million annually to charity. In 2001, he offered New York City a donation of $10 million towards relief efforts after the September 11, 2001 attacks. This was rejected by Mayor Rudy Giuliani because Al-Walid suggested that the attacks were an indication that the United States 'should re-examine its policies in the Middle East and adopt a more balanced stand toward the Palestinian cause'. (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.