International Spy Museum
Washington, D.C. (no photographs allowed inside).

National Cryptologic Museum
Fort Meade, Maryland, hosted by Bill Williams, Chief, History Division, National Security Agency.

Click on photos below for enlargements...

Bill Williams, taking questions...

and explaining the mission,...

the accoplishments and challenges...

of the NSA over lunch.

The German Enigmas...

and the American "Bombe" that decrypted Enigma traffic. Arguably the first electronic computer.