shootings, but they've seen the reduction in homicides. thanks to trauma centers, hospitals where people who might have died from gunshot wounds 10 or 20 years ago are now surviving. and they're taking their cue from afghanistan and the war there where lots of our military are surviving. >> a host of influences here. criminologist jack levin of northeastern university, thanks so much for your time and expertise. appreciate it. >> thank you, fredericka. >> and happy new year. all right. we've got much more straight ahead in the "newsroom." right now it's 3:00 eastern time. i'm fredericka whitfield. here's a look at our top stories. on the heels of a massive snowstorm, a fierce arctic cold front is sweeping across the country threatening to push low temperatures even lower and possibly shattering records across the u.s. and we have the results of a new study on vitamin e and