U.S. Attorney General Eric Holder arrives to talk to the media about the shooting of two police officers in Ferguson, and to announce pilot cities for DOJ program to build trust between law enforcement and communities they serve, at the Justice Department in Washington March 12, 2015. Holder said on Thursday the shooting of two police officers in Ferguson, Missouri, was a "heinous assault" that threatens reforms under way in the city. REUTERS/Yuri Gripas (UNITED STATES - Tags: POLITICS CRIME LAW)