When racial tensions flared in Sanford, a league of secretive peacemakers reached out to the city's spiritual and civic leaders to help cool heated emotions after 17-year-old Trayvon Martin was shot and killed in February. When civil-rights organizers wanted to demonstrate, these federal workers taught them how to peacefully manage crowds. They even arranged a police escort for college students to ensure safe passage for their 40-mile march from Daytona Beach to Sanford to demand justice. As national figures and sign-waving protesters grabbed the spotlight after Trayvon's death, federal workers from a little-known branch of the Department of Justice labored...
