In 1990 four puzzle codes were enshrined in a sculpture at the CIA headquarters, and to date, only three of the four codes have been broken. The artist, Jim Sanborn, says that he assumed the code would be cracked in a short time, but now, after 20 years, he is getting impatient. Sanborn has provided the New York Times with answers to six letters in the code. The characters that are the 64th through 69th in the final code read NYPVTT and when deciphered read BERLIN. Do some research on this sculpture (Figure 5.26) called Kryptos and report on your findings.

Figure 5.26