Interesting that the latest Popular Photography includes an article on war on photographers.
What it amounts to, is that the American police and security guards are using 9/11 and the fear of terrorism to intimidate and threaten photographers to prevent any kind of photography of buildings, bridges, transportation, museums etc., or even public squares etc. Apparently according to the article, this is coming straight from President Bush. They are using all kinds of excuses which are blatantly false. It is NOT against any american law to shoot photos of government buildings, bridges, transportation or any other kind of non-military non-secret establishment. Buildings cannot be copyrighted or trademarked and security guards or police have no authority to deal with such issues in any event.
Bottom line is that it is in the interest of every photographer to know the law and know their rights. Their camera equipment or photos for example cannot be seized by anyone including the police without a court order. Photographers have also usually won law suits related to their rights in american courts. Security guards can also be charged with assault for even touching a photographer who is in a public place exercising his or her rights in taking photos.
Ronnoco