'See, Officer, I Can Too Take That Picture' - NYTimes.com - http://lens.blogs.nytimes.com/2011...
"In the settlement, the agency pledged to inform its officers of the public’s general right to photograph the exteriors of federal courthouses. Now, the civil liberties group has received a redacted version of the directive that was sent out last year. Significantly, it embraces federal buildings — not just courthouses — nationwide. The three-page bulletin reminds officers, agents and employees that, “absent reasonable suspicion or probable cause,” they “must allow individuals to photograph the exterior of federally owned or leased facilities from publicly accessible spaces” like streets, sidewalks, parks and plazas. Even when there seems to be reason to intercede and conduct a “field interview,” the directive says: Officers should not seize the camera or its contents, and must be cautious not to give such ‘orders’ to a photographer to erase the contents of a camera, as this constitutes a seizure or detention."" - Simon