Gunfire

A woman runs for cover as heavy gunfire erupts in the Miskin district of Bangui, Central African Republic, Monday Feb. 3, 2014. In what a French soldier on the scene describes as the heaviest exchange of fire he'd seen since early December 2013, Muslim militias engaged Burundi troops who returned fire. A third source of firing remained unidentified. Fighting between Muslim Seleka militias and Christian anti-Balaka factions continues as French and African Union forces struggle to contain the bloodshed.

Jerome Delay/AP

A woman runs for cover as heavy gunfire erupts in the Miskin district of Bangui, Central African Republic. In what a French soldier on the scene describes as the heaviest exchange of fire he had seen since early December, Muslim militias engaged Burundi troops who returned fire.

WATERTOWN, MA - APRIL 19:  Police with guns drawn search for a suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. It's not clear whether the shootings are related or whether either are related to the Boston Marathon bombing.

Mario Tama/Getty

Police with guns drawn on Friday search for a suspect in Watertown, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late on Thursday night at the school’s campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. Read more