Ricardo "Cobe" Williams, wearing the cap, served time for attempted murder before joining CeaseFire as a "violence interrupter." Above, he talks with Lil Mikey in a scene from the documentary The Interrupters. Lil Mikey, who'd also been in prison, went on to become an outreach worker with the organization. Aaron Wickenden/Courtesy of Kartemquin Films hide caption

itoggle caption Aaron Wickenden/Courtesy of Kartemquin Films

U.S. Marines arrive at Saudi Arabia's Dhahran Air Base on Aug. 21, 1990. The U.S. began a buildup in the region just days after Iraq invaded Kuwait on Aug. 2 of that year. The U.S. military has been active in Iraq virtually nonstop for the past quarter-century. Gerard Fouet/AFP/Getty Images hide caption

itoggle caption Gerard Fouet/AFP/Getty Images

Iraqi Kurdish singer Helly Luv sings in support of Kurdish fighters, called the peshmerga, who are battling the Islamic State. Her songs are popular among Kurds in northern Iraq, though some critics say her outfits and dancing are un-Islamic. Safin Hamed/AFP/Getty Images hide caption

itoggle caption Safin Hamed/AFP/Getty Images

Iraqi workers clean the site of a truck bomb attack that hit the area a day earlier at Khan bani Saad town, eastern Baghdad, Iraq, on Saturday. At least 115 people were killed in what's described as the single deadliest such attack in the country in a decade. EPA/Landov hide caption

itoggle caption EPA/Landov