Up On The Roof

I have a tremendous fear of heights so I think that anybody who can work way up high on roofs of buildings, in boom trucks, on scaffolding, etc. are really very brave.  I took a couple of pictures of the roofers working on what seems very close to the edge of the building. The puny little plastic flag string they have marking the edge of the building wouldn't save anybody from falling off if they tripped and fell that close to the edge...