Northeast U.S. in deep freeze, could break Valentine's Day records

By Scott Malone and Valerie Vande Panne BOSTON, Mass (Reuters) - A dangerous cold snap gripped the northeastern United States on Saturday, with temperatures in some areas set to fall below zero and Boston facing its coldest Valentine's Day in almost four decades. Officials warned people to stay indoors away from what the National Weather Service described as "life threatening" cold. Wind chill advisories were in effect over parts of nine states extending from northern Pennsylvania to western Mai