A tear runs down the face of Pei Xia Chen, left, widow of New York City police officer Wenjian Liu, as she holds a photograph of her husband following funeral services for him 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