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Vidéo ci-dessous en anglais.
Few military requirements are as enduring as the need for timely, accurate information.
To meet this demand, the Department of Defense invests heavily in the development of powerful electronic and mechanical sensors, and in the manpower to maintain and operate those sensors. DARPA has been involved on the research side of the equation since the Agency's earliest days, developing technologies such as the VELA satellites and seismographs to ensure Soviet compliance with the Nuclear Test Ban Treaty.