December 18, 2013 11:44 pm Bitcoin Ready to Go Mainstream? Some in Silicon Valley are touting the digital currency as the future of how people will use and move money: inflation-proof, non-regulated and high-speed transactions at low costs. Stephanie Chuang 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