FLASHBACK to March 18, 1975:
Dr. Harb Hayre, a professor of electric engineering at the University of Houston on March 18, 1975, checks the write out of his tattletale machine. The device can analyze the voice and tell more about a person than words alone. Properly applied, says the professor, the machine could: detect a drunk driver; tell who is lying and who is telling the truth; determine if a pilot is to tired to fly; tell the precise condition of a mental patient; or, determine if a person is under the influence of drugs. (AP Photo/EFK)
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