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Timber Sycamore is a classified weapons supply and training program run by the United States Central Intelligence Agency and supported by various Arab intelligence services, most notably Saudi Arabia's. Launched in 2012 or 2013, it supplies money, weaponry and training to rebel forces fighting in the Syrian civil war. According to US officials, the program has trained thousands of rebels. President Barack Obama secretly authorized the CIA to begin arming Syria’s embattled rebels in 2013.