. >> warner: marcia coyle gives us the latest from the supreme court, including today's 8-1 ruling upholding the free speech rights of protesters at military funerals. >> woodruff: spencer michels reports on the controversy surrounding dozens of no fishing zones off the coast of california. >> california is establishing dozens of protected areas in the ocean, but the problem is there aren't enough game wardens to enforce the rules. >> warner: and jeffrey brown talks to libyan-born u.s. poet khaled mattawa about life in libya under qaddafi and today's uprising. >> woodruff: that's all ahead on tonight's "newshour." mar fuing r the pbs newshour has been provided by: ♪ ♪ moving our economy for 160 years. bnsf, the engine that connects us. >> and by the bill and melinda gates foundation. dedicated to the idea that all people deserve the chance to live a healthy productive life. 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 y

. >> ifill: then, marcia coyle walks us through today's supreme court arguments in a huge class action suit against wal-mart. >> woodruff: we update the nuclear crisis in japan, as the prime minister says his country is on "maximum alert." >> ifill: miles o'brien reports from the site of the world's worst nuclear disaster, the chernobyl power plant, where, decades later, radiation levels are still higher than normal. >> 25 years after the accident here, scientists are still trying to piece together its full impact. in the wake of events in japan there's new focus on their work. >> woodruff: and ray suarez interviews housing analyst robert shiller about new evidence of falling home prices in cities across the nation. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> oil companies have changed my country. >> oil companies can make a difference. >> we have the chance to build the economy. >> create jobs, keep people healthy and improve schools. >> .and our communities. >> in angola chevron helps train engineers, teachers and farmers; launc

>> brown: and marcia coyle of the "national law journal" analyzes two decisions handed down by the supreme court today on employment discrimination and corporate privacy. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> oil companies have changed my country. >> oil companies can make a difference. >> we have the chance to build the economy. >> create jobs, keep people healthy and improve schools. >> ... and our communities. >> in angola chevron helps train engineers, teachers and farmers; launch child's programs. >> it's not just good business. >> i'm hopeful about my country's future. >> it's my country's future. >> you can't manufacture pride, but pride builds great cars. and you'll find in the people at toyota, all across america. pacific life and by bnsf railway. and the william and flora hewlett foundation, working to solve social and environmental problems at home and around the world. and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting.

marcia coyle of the "national law journal" walks us through today's arguments. marcia, it's actually two joined cases. how did arizona free enterprise club versus bennett and... make it to the high court. >> it involves arizona's public financing law. under that law if a candidate qualifies and wants to participate, the candidate receives a lump sum grant at the beginning of the primary or general election. if during the campaign that grant is exceeded by a non-participating opponent's contributions and independent spending by organizations or groups supporting that non-participating opponent, then it triggers matching funds. the matching funds though are capped by the law. the publicly financed candidate can never receive more than three times the initial grant. a lower court upheld the constitutionality of the law, and it was the arizona freedom pack that brought the challenge as well as several candidates in arizona in the second case that brought the challenge to the supreme court today. >> suarez: is it not public financing per se, as much as the connection