For decades, the New York Police Department has arrested people, the vast majority people of color, for carrying so-called gravity knives, meant to open with a flick of the wrist. The problem is, it's not always clear what is and isn’t a gravity knife, and many workers use knives on the job. Our guest, Appeal contributor Jon Campbell, discusses the latest efforts in New York State to reform the laws, and prevent this questionable offense from sending people to prison.