News Analysis: U.S. military intervention in Syria no easy task

Reports of the use of chemical weapons in Syria have sparked talk of U.S. military intervention, but experts said stopping the bloodshed in the war-torn country could prove a gargantuan task. U.S. President Barack Obama has repeatedly said any use of chemical weapons would constitute a "red line" that could spur U. S. military involvement at some level, but Obama urged caution Tuesday, suggesting in a White House press briefing that more proof was needed.

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