The U.S. homeland security chief said on Sunday he takes seriously an apparent threat by Somali-based Islamist militants against prominent shopping sites in the West… Aug 27 The U.S. economy grew faster than initially thought in the second quarter on solid domestic demand, showing fairly strong momentum that could still allow the Federal Reserve to hike interest rates this year. Gross domestic product expanded at a 3.7 percent annual pace instead of the 2.3 percent rate reported last month, the Commerce Department said on Thursday in its second GDP estimate. The GDP report, which was released in the wake of a global stock market sell-off, should offer assurance to both investors and cautious Fed officials that the United States was in good shape to weather the growing strains in the world economy. […]