US-CRIME-POLICE-RACE-UNREST

Demonstrators light candles near the police station to protest the shooting death of 18-year-old Michael Brown in Ferguson, Missouri, on November 21, 2014. US President Barack Obama urged calm November 21 ahead of a grand jury decision expected to trigger protests in the restive town of Ferguson, where the FBI arrested two men for buying explosives. A grand jury in the St Louis suburb of Ferguson is looking at the racially charged shooting that saw white police officer Darren Wilson shoot unarmed 18-year-old Michael Brown, an African American. The black teen's August 9 death led to weeks of violence, and Missouri's governor this week declared a state of emergency and activated the state National Guard ahead of the decision. AFP PHOTO/Michael B. Thomas (Photo credit should read Michael B. Thomas/AFP via Getty Images)