paul solman reports on how the nation s toughest immigration law is affecting workers and employers. it s all about survival. that s just the bottom line, folks. without a viable labor source, we cannot survive. i just refuse to believe americans will not or cannot do these jobs. brown: we talk to biographer walter isaacson about the life and work of technology giant steve jobs. woodruff: mark shields and david brooks analyze the week s news. 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