When we were at the Tower of London in February the Crown Jewels were still closed for renovations. The yeoman warders were telling us all about the renovations, however, and how they were designed to make the Crown Jewels more visible and more accessible to more people. The implication was that SO MANY people want to see them that they were doing everything possible to increase the amount of people who could in a day. Guess moving walkways are part of the strategy. The National Archives in Washington, D.C. has not resorted to that strategy for access to the Declaration of Independence, etc. but they do have people making sure you don't linger too long. Since I live in D.C. I can keep going back but I know it is a kind of frustrating thing for a one time visitor. I don't know of many ways to balance the quality of the viewing experience and the desire of a large number of people to see such cultural icons.