Photo of the Day

Associated Press
FILE - This Sept. 19, 2007 file photo shows the National Security Agency building at Fort Meade, Md. As many as one of every five worldwide terror threats picked up by U.S. government surveillance has been targeted on the United States, the Obama administration says. But officials are reluctant to say much more about the 50 plots they claim have been thwarted. (AP Photo/Charles Dharapak, File)

View gallery

500 photos

View Comments (2)