From nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening, a saturday trip to the mall, the rite of weekends for millions of americans turned into a terrifying ordeal today for shoppers in a mall in suburban maryland when gunshots rang out. Police describe him as a lone shooter, producing a rifle inside a store. Witnesses say shoppers ran for safety, some making their way out. Others hiding in the mall for hours. When it was over, three people lay dead, including, police believe, the attacker. It happened in columbia, maryland, less than an hours drive from both washington, d. C. And baltimore. Nbcs Kristen Welker is there tonight with the latest, good evening. Reporter lester, good evening to you, this community has been deeply shaken by this apparent murdersuicide, and tonight police are scanning Surveillance Video and interviewing all those who witnessed the terror that unfolded here. We have an active shooter at the columbia mall, last se