. >> ifill: and, we talk to new orleans mayor mitch landrieu and brookings institution scholar amy liu about the comeback and the challenges five years after hurricane katrina. that's all ahead on tonight's "newshour." major funding for the pbs newshour has been provided by: and by the alfred p. sloan foundation. supporting science, technology, and improved economic performance and financial literacy in the 21st century. and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> woodruff: california's ban on same-sex marriage was overturned by a federal judge today when he ruled a ballot measure was unconstitutional. the landmark case brought by two gay couples who contended the ban violated their civil rights has been closely watched around the nation. "newshour" correspondent spencer michels has more on this long battle beginning with some background. >> reporter: it was a decade ago, in 2000, when california voters f