Lona DeNisco has lost track of the violent incidents that have taken place in the 20-odd years she’s worked as an emergency room nurse in Buffalo, New York. “There's not one shift that goes by that a nurse doesn't get punched, kicked, slapped, hair pulled. That happens every day,” she says. “I’ve been punched, taken to the ground.” She is also certain that the growing violence in the Buffalo community is spilling into her hospital, Erie County Medical Center.