Pei Xia Chen, center, widow of New York City police officer Wenjian Liu, holds an official new NYPD flag, as an officer salutes after giving her the flag following funeral services at Aievoli Funeral Home, Sunday, Jan. 4, 2015, in the Brooklyn borough of New York. Liu and his partner, officer Rafael Ramos, were killed Dec. 20 as they sat in their patrol car on a Brooklyn street. The shooter, Ismaaiyl Brinsley, later killed himself. (AP Photo/Julio Cortez), APTOPIX