Susan Piedmont-Palladino and Scott Kratz talk about a National Building Museum initiative to explore how we live in cities today and how to make better decisions for our future.

Phantom Projects share aspect of unreality; not only were they visionary at the time they were introduced, but also unattainable.

Irene Cheng and Brett Snyder share the inspiration behind their iPhone app and pose questions sparked by their research. Read their story and then go tour the unbuilt city.