Riot policemen arrest a teacher during a protest against the education reform in Mexico City on November 26, 2013. President Enrique Pena Nieto pushed through Congress changes to the constitution in order to require teachers to undergo mandatory performance appraisals. (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.