Apple has announced that Dr. Ronald D. Sugar, former Chairman of the Board and CEO of Northrop Grumman Corporation, has been appointed to the company’s Board of Directors. According to the release, Dr. Sugar served as Chairman and Chief Executive Officer at Northrop Grumman Corporation from 2003 until his retirement in 2010, and has also held executive positions at Litton Industries and TRW Inc., where he served as chief financial officer. In…