. >> brown: special correspondent anna werner reports on an investigation showing safety risks in some california schools. people won't find out until a disaster happens or an earthquake happens. and at that point it's too lachlt i don't want to see kids get killed. >> woodruff: margaret warner updates the revolution in egypt, where protesters are back in cairo's main square. >> brown: and ray suarez has the story of a warm welcome back for detroit's symphony orchestra after a six-month strike. >> woodruff: that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: during the first year a humpback calf and its mother are almost inseparable. she leds him to its first breath of air and protects them on the long journey to their feeding grounds. one of the most important thing you can do is help the next generation. at pacific life we offer financial solutions to accomplish just that. your financial professional can tell you about pacific life, the power to help you succeed. >> i mean >> i mean, where would we be without small businesses? >> we need s