A law enforcement officer fires tear gas in the direction where bottles were thrown from crowds Monday, August 18, in Ferguson, Missouri. The St. Louis suburb &lt;a href='http://www.cnn.com/2014/08/14/us/gallery/ferguson-missouri-protests/index.html'&gt;has been in turmoil&lt;/a&gt; since Darren Wilson, a white police officer, fatally shot Michael Brown, an unarmed black teenager, on August 9. Some protesters and law enforcement officers have clashed in the streets, leading to injuries and arrests.