Google unveiled plans Friday for a new campus headquarters integrating wildlife and sweeping waterways, aiming to make a big statement in Silicon Valley -- which is already seeing ambitious projects from Apple and Facebook. The redesign on the Google property in Mountain View, California, by Danish architect Bjarke Ingels and London-based Thomas Heatherwick, was submitted to local officials Friday, with details released on the company's official blog. The latest huge design project in Silicon Valley comes as Apple is in the midst of building its "spaceship" campus and Facebook is using renowned architect Frank Gehry for its campus expansion.

Prime Minister David Cameron on Friday defended Britain's security services and vowed to defeat Islamic extremists after media reports named Islamic State executioner "Jihadi John" as London graduate Mohammed Emwazi. "We will do everything we can with the police, the security services, with all that we have at our disposal, to find these people and put them out of action," Cameron said at news conference in Wales.

U.S. economic growth braked more sharply than initially thought in the fourth quarter amid a moderate increase in business inventories and a wider trade deficit, but strong domestic demand brightened the outlook. Gross domestic product expanded at a 2.2 percent annual pace, revised down from the 2.6 percent pace estimated last month, the Commerce Department said on Friday. The economy grew at a 5 percent rate in the third quarter. Businesses accumulated $88.4 billion worth of inventory in the fourth quarter, far less than the $113.1 billion the government had estimated last month.