What's behind an effort to preserve mid-century modern architecture in Phoenix

Some people see older buildings as revered artifacts that have stood the test of time, but others see them as occupying sites that could be used for new development. That tension is currently playing out in Phoenix, Arizona, a city that's a rich source of one specific style of architecture. Ali Rogin reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders