June 10, 2013 11:26 am Apple Unveils Changes Among the topics addressed by Apple CEO Tim Cook at the Apple Worldwide Developers Conference was the “Mavericks” operating system – the 10th version – which is designed to helped app developers. Scott McGrew reports. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks