at&t paying out millions in refunds after it was accused of misleading customers about unlimited plans. are you entitled to money back millions bracing for the coldest temperatures and first snow of the season al roker tracking that and the new trend among american business what would you say to a four-day workweek? >> announcer: this is "nbc nightly news" with lester holt >> good evening. we begin with that horrific massacre of american women and children ambushed on a highway in northern mexico as they were on their way to go shopping and visit family nine people in all were killed, apparently at the hands of drug traffickers. the victims were part of an extended family, descendants of a mormon offshoot group that settled in the area decades ago tonight five wounded children are back in the u.s., being treated in arizona our miguel almaguer is there. >> rhonita and four of my grandchildren are burnt, shot up >> reporter: it was a bloodbath south of the border