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>> lehrer: we examine what's next for apple, as c.e.o. steve jobs takes another medical leave. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> okay, listen. somebody has got to get serious. >> i think... >> we need renewable energy. >> ...renewable energy is vital to our planet. >> you hear about alternatives, right? wind, solar, algae... >> i think it's going to work an a big scale. only, i think it's going to be affordable. >> so where are they? >> it has to work in the real world. at chevron, we're investing millions in solar and...

can be persuaded to rein in north korea. >> they want obama to persuade president hu that china needs to pressure north korea to act more responsibly vis-a-vis south korea. >> lehrer: we examine what's next for apple, as c.e.o. steve jobs takes another medical leave. that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> okay, listen. somebody has got to get serious. >> i think... >> we need renewable energy. >> ...renewable energy is vital to our planet. >> you hear about alternatives, right? wind, solar, algae... >> i think it's going to...