Russian Spy Ring; Tim Westergren; Matt Tyrnauer

Espionage experts Scott Shane, Charles Kupchan, and Peter Earnest explain how an 11-person Russian spy ring managed to operate in the U.S. for years and what impact its discovery might have on U.S.-Russian relations. Tim Westergren, chief strategy officer of Pandora Internet Radio, reflects on the path that led him to founding his company. Journalist Matt Tyrnauer of Vanity Fair focuses on Frank Gehry's Guggenheim Museum Bilbao, which topped the magazine's list of the most important pieces of recent architecture.