Saudi Arabia, in an unprecedented show of anger at the failure of the international community to end the war in Syria and act on other Middle East issues, said on Friday it would not take up its seat on the United Nations Security Council. The kingdom condemned what it called international double standards on the Middle East and demanded reforms in the Security Council. Riyadh's frustration is mostly directed at Washington, its oldest international ally, which has pursued policies since the Arab Spring that Saudi rulers have bitterly opposed and which have severely damaged relations with the United States, Saudi...