n 1957, the Soviet Union caught the US completely off-guard. Its military launched Sputnik – the world's first artificial satellite – heralding the dawn of the space age.
President Eisenhower's response was to create the Advance Research Projects Agency (ARPA) with a clear mission: "prevent technological surprise". Eisenhower hoped that the agency would produce revolutionary technologies and thus guarantee that never again would the US military be caught with its technological trousers down.
Now in its 50th year, the Defence Advance Research Projects Agency has an impressive list of accomplishments behind it.
After playing an integral role in the fledgling US space programme, DARPA gave us the satellite-based global positioning system (GPS), stealth aircraft and the precursor to the internet. So it is hard to argue that the agency hasn't lived up to Eisenhower's early dream.
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