At 34:07, we get a look at the, for the time, amazing AN/TPS-25 ground surveillance Doppler radio which could detect individual soldiers and was widely used to counter infiltration in Vietnam.
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A related book is: “The Invention That Changed The World – How a small group of radar pioneers won the Second World War and launched a technological revolution” by Robert Buderi (1996), ISBN 978-0684810218
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