Tuesday night marked the first shift for 12 state troopers who've come to Minneapolis to help the city's police force handle a spike in violent crime. Half the troopers were deployed to the 4th Precinct in North Minneapolis, which has been the site of some of the most recent shootings. The deployment coincided with National Night Out and the troopers got a chance to see that even in one of the most troubled parts of the city, there are a lot of people working for change. Minnesota Public Radio's Brandt Williams reports: