Eight East Coast states have petitioned the Environmental Protection Agency to impose tougher air pollution standards on the coal-producing Midwest. The Supreme Court will hear arguments on air quality mandates. Diane and her guests discuss the battle over cross-state air pollution.

Germany recently published details about more than 100 artworks, including pieces by Picasso and Cézanne, discovered in Munich as part of a huge stash of suspected Nazi loot. Diane and her guests discuss why so little has been done to return stolen goods to Holocaust victims and their families and what this incident means for institutions and collectors in the U.S.