Embedded Player It's hard to figure out what to say after the horrific violence of the last week, which began with two new viral videos of police shooting black men and ended with a deadly attack by a black gunman on police officers. But Shereen Marisol Meraji, Gene Demby along with Kat Chow of the Code Switch Team got some help from a Dallas resident as well as Harvard historian Khalil Gibran Muhammad, who has written extensively about race, crime and policing.