CNN Senior International Correspondent Clarissa Ward and Producer Salma Abdelaziz went undercover in rebel-held Syria, where few Western journalists have gone for more than a year. They worked with Syria-based filmmaker Bilal Abdul Kareem on a series of exclusive reports. Warning: Graphic images.

On a hill overlooking Ariha, our guard Abu Youssef seems to have located the jet in the sky and is following it with his eyes. "Russian planes," he says.

Suddenly he ducks. The sound of the explosion rings out with a "thwoomp."

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In 2013, the Council on Foreign Relations (CFR) Contingency Planning Memorandum "Political Instability in Jordan" warned that the biggest threat to the stability of the Hashemite Kingdom stemmed from local grievances eroding the regime's core tribal base of support. Although economic privation, the slow pace of reform, and a widespread perception of corruption remain significant sources of popular frustration in Jordan, the palace has since vitiated its most potent tribal and Islamist domestic political opposition, the Muslim Brotherhood. But as the risk of domestic unrest has diminished, the potential for spillover from the Syrian conflict has grown, posing an increasing threat to Jordan.

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