FILE - In this June 6, 2013 file photo National Security Agency plaques are seen at the compound at Fort Meade, Md. The NSA was founded in 1952 but only publicly acknowledged years later, which explains its nickname “No Such Agency.” It includes the Central Security Service, the military arm of code breakers who work jointly with NSA. Visible from a main highway, the tightly guarded compound requires the highest of clearances to enter, and is equipped with various electronic means to ward off an attack by hackers. (AP Photo/Patrick Semansky, File)

Associated Press
FILE - In this June 6, 2013 file photo National Security Agency plaques are seen at the compound at Fort Meade, Md. The NSA was founded in 1952 but only publicly acknowledged years later, which explains its nickname “No Such Agency.” It includes the Central Security Service, the military arm of code breakers who work jointly with NSA. Visible from a main highway, the tightly guarded compound requires the highest of clearances to enter, and is equipped with various electronic means to ward off an attack by hackers. (AP Photo/Patrick Semansky, File)
FILE - In this June 6, 2013 file photo National Security Agency plaques are seen at the compound at Fort Meade, Md. The NSA was founded in 1952 but only publicly acknowledged years later, which explains its nickname “No Such Agency.” It includes the Central Security Service, the military arm of code breakers who work jointly with NSA. Visible from a main highway, the tightly guarded compound requires the highest of clearances to enter, and is equipped with various electronic means to ward off an attack by hackers. (AP Photo/Patrick Semansky, File)
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