. >> woodruff: tom bearden reports on a controversial method of extracting natural gas from shale rock. . >> some people here in western colorado believe a national gas production technique called f >> brown: ray suarez examines allegations of war crimes committed by the sri lankan government near the end of the country's 25-year-long civil war. >> woodruff: and we continue our collaboration with "the economist" magazine to highlight the art of filmmaking. tonight, letting kids be kids in a skating park in war-torn afghanistan. >> there's nothing like watching an afghan woman go down a ramp for the first time. she's achieved something that she never thought she would. >> brown: that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: >> i mean, where would we be without small businesses? >> we need small businesses. >> they're the ones that help drive growth. >> like electricians, mechanics, carpenters. >> they strengthen our communities. >> every year, chevron spends billions with small businesses. that goes right to the heart of local communiti

. >> ifill: tom bearden reports on the scientific push to identify possible tornadoes sooner, get out warnings earlier. 6-top beardsley reports on the scientific push to identify possible tornados sooner and get out warnings earlier. >> lehrer: we look at the media spotlight on sarah palin's bus tour. >> ifill: and, jeffrey brown talks to trumpet player and band leader wynton marsalis about passing his love of jazz on to the next generation. >> lehrer: 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 got to work on a big scale. and i think it's got to be affordable. >> so, where are they? >> it has to work in the real world. at chevron, we're investing millions in solar and biofuel technology to make it work. >> we've got to get on this now. >> right now. moving our economy for 160 years. bnsf, the engine that connects us. >>