 Sometimes, if it's a high enough building, in this case it did not look to be that high of a building, they'll put a uniform presence on the roof so that the snipers see the uniform and know that that is law enforcement. You don't want to put, obviously, a plainclothes person up there. In this case, maybe they identified it. Maybe they designated local law enforcement or Secret Service poststanders to secure the building. And somewhere along the line, something happened where, obviously, that was not the case before.