SUNNYVALE, Calif.--(BUSINESS WIRE)--Yahoo! Inc. (NASDAQ:YHOO) Today, Yahoo issued the fourth update to its transparency report, continuing the company’s efforts to provide as much information as possible about government requests for users’ data and government requests to remove content. This latest transparency report contains information covering the last six months of 2014 (July 1 - December 31, 2014). This includes National Security Letters (NSLs) and criminal data requests (such as search