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By Patricia Zengerle and Jonathan Landay WASHINGTON (Reuters) - The U.S. envoy to the coalition against Islamic State said on Wednesday that Russian airstrikes in Syria are boosting the militant group because of the toll they are taking on U.S.-backed opposition fighters. "What Russia's doing is directly enabling ISIL," the envoy, Brett McGurk, told a hearing of the House of Representatives Foreign Affairs Committee, using an acronym for Islamic State.
Federal Reserve Chair Janet Yellen warned Wednesday that the US economy faced risks from tightening domestic financial conditions as well as global economic turmoil. Expressing more pronounced concerns than when she last spoke publicly in December, Yellen told a congressional hearing that the outlook for the US economy had become more cloudy. "Financial conditions in the United States have recently become less supportive of growth, with declines in broad measures of equity prices, higher borrowing rates for riskier borrowers, and a further appreciation of the dollar," she told the House Financial Services Committee.