Surveillance video shows a scene leading up to a police officer shooting and killing an armed man at a gas station in Berkeley, Mo. The St. Louis County Police Department is investigating the case, in which an 18-year-old man died. Reuters/Landov hide caption

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A picture of French tourist and mountain guide Herve Gourdel, 55, who was killed after being kidnapped on Sept. 21 while hiking in Algeria's Djurdjura National Park. The leader of the group that killed Gourdel has been killed in a military attack. Farouk Batiche/AFP/Getty Images hide caption

itoggle caption Farouk Batiche/AFP/Getty Images

Ramon Maldonado takes his driving test with the Arizona Department of Transportation Motor Vehicle Division. Many young immigrants protected from deportation under the Obama administration's new policies began pursuing driver's licenses in the state Monday. Ross D. Franklin/AP hide caption

itoggle caption Ross D. Franklin/AP

A Milwaukee prosecutor says no charges will be filed against a police officer who shot and killed Donte Hamilton in April. Here, Maria Hamilton holds posters used in rallies that vent frustrations about the death of her son. M.L. Johnson/AP hide caption

itoggle caption M.L. Johnson/AP