Two decades after 9/11, many simple acts that were once taken for granted now seem unfathomable: strolling with loved ones to the gate of their flight, meandering through a corporate plaza, using streets near government buildings. Our metropolises’ commons are now enclosed with steel and surveillance. Amid the perpetual pandemic of the past year and a half, cities have become even more walled off. With each new barrier erected, more of the city’s defining feature erodes: the freedom to move, wander, and even, as Walter Benjamin said, to “lose one’s way … as one loses one’s way in a …
