Lt. Gen. Keith B. Alexander, director of the National Security Agency, and William Marshall, another NSA official, give President Bush a tour of the super-secret agency's headquarters in Fort Meade, Md. Lt. Gen. Keith B. Alexander, director of the National Security Agency, and William Marshall, another NSA official, give President Bush a tour of the super-secret agency's headquarters in Fort Meade, Md.
Photo Credit: By Evan Vucci -- Associated Press
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