Syria; Cory Booker; Christine Quinn; New Taxis; Innovative Cities

The chemical weapons "red line" has been crossed in the Syrian conflict. What's next? Plus: Newark Mayor Cory Booker makes his case for the open senate seat in New Jersey. Plus: City Council Speaker Christine Quinn talks about her campaign to be the next mayor of New York City; author and architect William McDonough explains what it means to upcycle; Transportation Nation reporter Kate Hinds answers basic questions on the new outer-borough taxis rolling out later this summer; and Bruce Katz, founder of the Brookings Metropolitan Policy Program and author of a new book, discusses how cities are on the forefront of civic innovation.