A New York City Police officer stands next to a flag flying at half mast on a roof of the 66th Police...
A New York City Police officer stands next to a flag flying at half mast on a roof of the 66th Police Precinct headquarters in Brooklyn, New York, December 23, 2014, during a rally with members of the community in support of police after two police officers were fatally shot in the Brooklyn borough of New York Saturday, December 23, 2014. NYPD officers, Wenjian Liu and Rafael Ramos were shot and killed as they sat in a marked squad car in Brooklyn on Saturday afternoon, New York Police Commissioner William Bratton said. The suspect in the shooting then shot and killed himself, according to Bratton. REUTERS/Mike Segar (UNITED STATES Tags: SOCIETY CIVIL UNREST)