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US Senator Elizabeth Warren, Democrat of Massachussetts, attends a US Senate Banking, Housing and Urban Affairs Committee hearing on Capitol Hill in Washington, DC, February 24, 2015. Federal Reserve Chair Janet Yellen testified Tuesday that the US labor market still showed cyclical weakness and inflation continued to fall, making any interest rate hike unlikely before June. In testimony in Congress, Yellen also said that frailties in China and Europe continued to pose a risk for the US economy, supporting the need for keeping the extraordinarily loose monetary policy currently in place. But she said that generally the US economy continued to grow fast enough to bring down unemployment, and the Fed expected that inflation would return back to normal over the medium term. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP via Getty Images)