college murders ahead of his first court appearance. the father of one victim speaking out. how he feels about potentially coming face to face with the alleged killer. new images of the crowd fleeing after the new year s eve machete attack on nypd officers. the suspect now charged. was it a terrorist act? new troubles as holiday travelers make their way home. why thousands of flights are canceled or delayed again. actor jeremy renner airlifted to the hospital after he was critically injured in a snow plowing accident. what we re learning. and our tribute to a tv trailblazer. the legendary barbara walters. announcer: this is nbc nightly news with lester holt. good evening. it is good to be back with you and happy new year. this holiday season that has seemingly been bookended with severe weather is spawning some new and dangerous threats tonight. as we come on the air, tornado watches are in effect, stretching from east texas to arkansas and louisiana. already we
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