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MELISSA BLOCK, HOST:
From NPR News, this is ALL THINGS CONSIDERED. I'm Melissa Block.
AUDIE CORNISH, HOST:
And I'm Audie Cornish. The conflict in Syria now in its 4th year, and a diplomatic solution seems as far off as ever. The international diplomat who's been trying to lead negotiations announced he's stepping down. It's a new sign of just how bad things are Syria. And as NPR's Michele Kelemen reports, there doesn't seem to be a plan B.
MICHELE KELEMEN, BYLINE: Two seasoned diplomats have now tried their hand at diplomacy on Syria only to quit out of frustration.