i'm uma pemmaraju in washington.s coping with another shot of miserable weather that is affecting a big part of the country in this hour. people across the midwest and northeast will be hit with several inches and in some cases a foot of snow. all of this makes for roads and travel delays. storm spreading across thousands of miles in several states. we will get the latest from rick reichmuth in a few minutes. there is a lot of questions surrounding the motive for student at a colorado high school that open fire and wounded a teenager before the young gunman killed himself. we have the latest on the investigation at the top of the hour. john speaker john boehner take aim at the tea party critics who don't like the budget deal. what will the tirade have on the divided g.o.p.? we have mike huckabee. that and a ride on the snowball express. that's coming up in ten minutes. >>> parents putting x-box under the tree, beware. the n.s.a. is using the gaming system to snoop on the conversations between the players they think t

i'm uma pemmaraju in washington. so far, so good. the word on the risky spacewalk two american astronauts are taking part in now as they try to fix a faulty pump on the international space station. we'll have a live report and get inside information on the mission from former astronaut lon guerin at the top of the hour. millions of you head home for the holidays. brace yourself for possible travel nightmares. a dangerous winter storm is hitting the area that could bring everything from ice and snow to tornadoes. jansen has the late -- janice dean has the latest. remember the lockerbie bombing? mark the day 25 years ago that pan am flight 103 was blown up in a terrorist attack. we'll have a live report. new develop in the the deadly carjacking in new jersey that shocked in people across the country. that and more coming up in ten minutes. stay with us. >>> someone is spreading the wealth along with the holiday cheer this christmas. anonymous customer is leaving huge tips for waiters and bar tepidders across the country. putting tips f

i'm uma pemmaraju. a lot to talk about, straight ahead. ♪ ♪ >>> the g.o.p.closed doors infighting is out of the bag and in full view. >> there comes to a point when some people step over the line. >> is there a feud between the house republicans and the tea party conservatives about to boil over? governor mike huckabee will weigh in. and does he have news of another possible white house run? plus new, in the case of the marine penalized for the political correctness. he warned officials of an insider attack. and is now facing some tough charges that could end his career. we get on the snowball express and show how this group is bringing joy of christmas to the fallen heroes. america's news headquarters starts right now. ♪ ♪ >> but first, to a developing story with new details emerging at this hour. about the motive in yesterday's tragic high school shooting not far from denver colorado. that attack ending with one student critically injure and the lone student gunman dead. place are saying that teen shooter was likely out for revenge. the latest now from wil

i'm uma pemmaraju. live in washington. let's get right to the story. making news right now.inic di-natale has the latest on this important spacewalk. dominic? >> the crew certainly have their work cut out for them today. rick and michael hopkins replacing that ammonium pump that went bad with a valve aboard the international space station. the takewalk started 7:15 eastern time this morning. booking flour ammonium fluid lines. take a live picture. we can perhaps see them work on it now. encounters a loose bolt as he was doing it and he had to tell mission control who was afraid it would come off. he was assured by the ground everything would be fine. they had flakes of frozen ammonium had brushed against his suit. he said more flakes are coming off. he radioed in. steady stream is how he described it but he is still working. you see him with the large solar array in background. the problem to rignateed in a cooling system. astronauts had turned off the nonessential equipment aboard the i.s.s. now they say the breakdown isn't life-threatening but the spacewalks are risky. las