What Is The Supreme Court Doing Behind The Scenes?

The Supreme Court is scheduled to rule on two landmark cases in the next few days - same-sex marriage and the Affordable Care Act. Advocates and critics of the death penalty are also watching for a ruling on the constitutionality of some lethal injection drugs.

But why do all these big cases come at the same time? What goes on behind the scenes of the Supreme Court as a session winds down? Here & Now's Robin Young asks NPR Legal Affairs Correspondent Nina Totenberg.