 What you're hearing at the National Cathedral is changing. It's because of a total renovation project involving the cathedral's organ. And WTOP's Nick Ionelli checked it out. So this is a temporary scaffold. We're about 40 feet off the floor. The National Cathedral's organ is being dismantled, with crews working up here, high above the ground, hauling out 10,000 organ pipes. This is the beginning of a very long, very complicated project.