The Emir of Qatar, Sheikh Hamad bin Khalifa al-Thani (L) and Algeria's President Abdelaziz Bouteflika leave the Boumediene airport on January 7, 2012 in Algiers. Bin Khalifa al-Thani is on an official visit following a bilateral agreement to build a steel complex on the eastern coast. (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.