St. Louis police arrest a protester outside the Thomas F. Eagleton Federal Courthouse, Monday, Aug. 10, 2015, in St. Louis. Protesters have been arrested after blocking the entrance to the St. Louis federal courthouse while calling for more aggressive U.S. government response to what they call racist law enforcement practices. (AP Photo/Jeff Roberson)

Ferguson: Community on edge

A protest marking the anniversary of Michael Brown’s death was punctuated with gunshots and police critically wounded a black 18-year-old ac…