“Cities exist to bring people together, but cities can also keep people apart” - Daniel D’Oca, Urban Planner, Interboro Partners. Cities are great. They have movement, activity and diversity. But go to any city and it’s pretty clear, a place can be diverse without really being integrated. This segregation isn’t accidental. There are design elements in the urban landscape, that Daniel D’Oca calls “weapons,” that are used by “architects, planners, policy-makers, developers, real estate brokers, community activists, neighborhood associations, and individuals to wage the ongoing war between integration and segregation.” Daniel D’Oca is an urban planner with Interboro Partners, an architecture and design firm based in New York City. Over the past few years, D’Oca, along with colleagues Tobias Armborst and Georgeen Theodore have been cataloging all the stuff inside of a city that planners use to increase or restrict people’s access to space. They’re publishing their findings in a book called The Arsenal of Inclusion and Exclusion: 101 Things That Open And Close the City (Fall 2012). D’Oca took our own Sam Greenspan and Scott Goldberg on a tour of Baltimore to demonstrate the subtle ways different neighborhoods are kept apart.