after the disappearance of kristin smart, the verdict in the murder trial of her former college classmate. blackouts in ukraine after officials say russia destroyed nearly a third of its power station in little over a week. growing fears for an iranian climber after she competed without a hijab. the worries about her safety tonight. the deadly crash. a plane slamming into a car dealership. the fda pushing to take a controversial pregnancy drug off the market. why some doctors and moms say it s a mistake. and the wikipedia warrior fighting to get some remarkable women the recognition they deserve. announcer: this is nbc nightly news with lester holt. good evening. in a year defined by some of the most extreme heat we ve ever seen, along with one of the strongest hurricanes to hit the u.s. mainland, tonight making headlines for unseasonable cold and early snow. in the east, autumn interrupted by a sudden and dramatic detour into winter. a climate change whiplash l