By Phil Stewart and Robin Emmott BRUSSELS (Reuters) - The United States pressed allies on Thursday to contribute more to a U.S.-led military campaign against Islamic State that it says must be accelerated, regardless of the fate of diplomatic efforts to end Syria's civil war. U.S. Defense Secretary Ash Carter started talks on Thursday in Brussels with more than two dozen defense ministers, including from key ally Saudi Arabia, which renewed its offer potentially to send troops into Syria.
Federal Reserve Chair Janet Yellen returned to Capitol Hill on Thursday amid an ongoing meltdown in global equity markets and growing skepticism that the U.S. central bank can carry out its long-planned pivot to "normal" monetary policy. Yellen repeated to the Senate Banking Committee the testimony she delivered on Wednesday to a House of Representatives committee, putting a brave face on the U.S. economic recovery while acknowledging that a weakened global economy and steep slide in U.S. equity markets is tightening financial conditions faster than the Fed wants. Yellen warned on Wednesday that the rout, if proven to be "persistent," could change the U.S. economic outlook - and by implication the Fed's policy plans.