Nik Altenberg writes: “About 100 librarians and their supporters rallied outside San Francisco Public Library’s Main Library on April 9 to demand the city hire security guards for every branch. Workers decried a lack of security at most of the city’s branches and said they are often forced to de-escalate volatile situations and step into the role of providing security themselves. The rally is the latest in a series of union actions [from 10 unions representing more than 25,000 city workers across city departments] seeking to draw attention to what they say is a pervasive understaffing crisis.”