A potent winter storm has brought holiday travel to a grinding halt for millions of Americans, burying the Midwest in snow and threatening the Northeast with hazardous conditions as the post-holiday return rush begins. More than 30 million people are currently under winter weather alerts as the syst em intensifies. The National Weather Service has issued […] Winter Whiplash: Massive Storm Snarls Flights And Shuts Down Interstates During Holiday Rush ...read more read less