What would happen if a famous band played on a rooftop? What if they played as loud as they could in the middle of a busy city? On March 27, 1987, the Irish rock band U2 did exactly that. They climbed to the roof of a store in Los Angeles. They were filming a video for "Where The Streets Have No Name." The plan was bold. Director Meegan filmed the band playing live while cameras on the street captured people's reactions. Within minutes, traffic on the road below came to a complete stop. Hundreds of people gathered on the sidewalks, dancing and cheering. The Los Angeles Police Department arrived and ordered the band to stop. But the crew kept the cameras rolling as long as they could. In the end, the police pulled the plug, but not before U2 had captured something electric on film. The video became one of the most famous in music history. It reminded the band of a tradition that went back to the Beatles. Who had played their last live concert on a London rooftop in 1969. Sometimes the best art happens when you break the rules just a little.