Declassified

Obama Administration Argues Over Support for Syrian Kurds

Fighters backed by U.S. are attacking Sunni rebels who are also getting American arms.

Kurdish YPG fighters have been America's most effective allies against the Islamic State.

Photographer: Ahmet Sik/Getty Images

Syrian Kurds are now attacking U.S.-supported rebels, but U.S. officials disagree about whether the Kurds have switched sides -- and about whether the U.S. should continue increasing its arms support for them, as opposed to focusing support on Sunni Arab rebels.

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