Last winter, a crew from the BBC's technology program Click visited Chicago to learn more about the Array of Things, the Urban Center for Computation and Data city-wide sensor network project. Reporter Marc Cieslak went to Argonne National Laboratory, the School of the Art Institute of Chicago, and the Chicago Architecture Foundation's "City of Big Data" exhibit to profile the technology, design, and potential of the project, which hopes to install hundreds of sensor nodes around the city over the next three years.