karin brown, cbs news, los angeles. >> so many women going through this. what can you do? there is one thing. you can bring your previous mammograms with you each year to reduce the chances of being called back, or get them done at the same place so they can track t make sure the radiologist has previous images to refer to. >>> the same engineers who rapelled down the side of the washington monument are doing exactly the same thing, but at the national cathedral, which was also damaged in the august 23rd earthquake. peggy joins us to talk about what they are looking for out there. >> reporter: the cathedral has been closed since august 21st because of that earthquake, which did damage it. it is structurally sound. but they are worried some of the stone carvings, both inside and outside, may have become unstable and may fall. so today, engineers began inspecting the facade outside, way up there. >> it is a good thing it is not windy today. >> reporter: the beautiful weather is why the start of this inspection process was moved to today. you wouldn't want to be rapellings 23