Sultan bin Abdulaziz Al Saud was the Crown Prince of Saudi Arabia († 2011). He was minister of defense and aviation. He held the latter post since 1962, making him the longest-serving defense minister in the world. He built the modern Saudi military and concluded some of the largest arms sales in history.
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During his half century in government, he amassed a fortune estimated by Saudi sources at over $270 billion, which he distributed between his sons prior to his death in order to shore up their political position in the competitive princely arena.