AdvertisementIn First Of 2 Gay-Marriage Cases, Court Turns To Proposition 808:56Download AudioResumeMarch 25, 2013Nina TotenbergfacebookEmailSnow covers flowers in front of the Supreme Court building on Monday in Washington, D.C. On Tuesday, the justices hear oral arguments on the constitutionality of California's Proposition 8, which banned gay marriage. (Reuters /Landov)