You won't be able to read this version of this internal memo from the U.S. Department of Homeland Security. But what it basically says is that law enforcement officers should stop harassing photographers who are making pictures of putatively "sensitive" Federal sites. It explicitly instructs officers to not seize equipment or otherwise interfere with photographers as they go about their business. You can find links to a life size (legible and printable) version of the document here at The New York Times.
