Would a U.S. attack on Syria lead to new bloodshed in Damascus?

The L.A. Times examines this last question:

Edgy residents of the Syrian capital are grappling with a difficult question: What if a U.S. airstrike helps rebels poised on the city’s outskirts to storm into the heart of Damascus?

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speculation is rampant that U.S. air attacks will try to break down government defenses and enable opposition forces to storm into the streets of the capital