Alejandro Aravena and the Obama Library Finalists

Some big announcements in the architecture world: Alejandro Aravena won the coveted Pritzker Prize, and the list of firms vying to design the Obama Presidential Library in Chicago was narrowed to seven.

Cliff Pearson talks about Aravena's socially oriented, "muscular" work, and the firms in the running for the Obama Library design. Aric Lasher weighs in on how Obama's transformative role as America's first black president shapes expectations for his library.