LONDON – Irish band U2 returned to school Friday (Sept 25) to put on a surprise class in rock and roll where they formed a half century ago. The band ripped through a seven-song set including an encore of With or Without You for hundreds of students in the schoolyard of Mount Temple Comprehensive School in Dublin and a crowd of others who got word of the gig or – like a construction crew several floors up a nearby building – were lucky to be within earshot and have a bird's eye view. "We escaped the lab – how's the experiment going for you?" Bono said as he pointed to the science classrooms. The band got its start at the school 50 years…
