More Unrest in Wake of Police Shooting of Unarmed Black Teenager

Riot police stand guard as demonstrators protest the shooting death of teenager Michael Brown, in Ferguson, Missouri Aug. 13, 2014.

Riot police stop a vehicle as they clear a street of demonstrators, in Ferguson, Missouri, Aug. 13, 2014.

Riot police clear a street with smoke bombs while clashing with demonstrators, in Ferguson, Missouri Aug. 13, 2014.

Lesley McSpadden (right), mother of 18-year-old Michael Brown, watches as Brown's father, Michael Brown Sr., holds a family picture, during a news conference, Aug. 11, 2014.

A man watches as police walk through a cloud of smoke during a clash with protesters, in Ferguson, Missouri, Aug. 13, 2014.

A protester wears a sign on his back during a protest against the shooting death of teenager Michael Brown, in Ferguson, Missouri, Aug. 13, 2014.