Police patrol DuBois downtown; Arlington sees incident of violence, while seeking top city ranking again.

Police are patrolling downtown DuBois to enhance safety and security, with no reports of specific incidents. In Arlington, a knife-wielding man chased a good Samaritan in Rosslyn, and Bartaco restaurant closed its Ballston Quarter location. Arlington again ranks among America's top cities to live in. Meanwhile, Lexington, Virginia, is seeking a new alert system to improve emergency response times.