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Royal Saudi Air Defence (Arabic: الدفاع الجوي الملكي السعودي) is the fourth branch of Saudi Armed Forces. It was a part of the Army until 1970, when it was made independent by Field Marshal Khalid bin Sultan. The RSADF has its headquarters in Riyadh, there is also here an elaborate underground command facility that co-ordinates Saudi Arabia's advanced "Peace Shield" radar and air defence system - reputed to be the most advanced radar network in the world.
Peace Shield 
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