"Between 1967 and 1972, the Air Force ran Operation Igloo White at the cost of nearly $1 billion a year. Through an array of sensors designed to record sound, heat, vibrations, and even the smell of urine, feeding information to a control centre in Thailand which sent on the resulting targeting information to patrolling jet aircraft (even the release of bombs could be controlled remotely), this vast cybernetic mechanism was designed to disrupt the Ho Chi Minh Trail, a network of roads and trails providing logistical support to the North Vietnamese. At the time, extravagant claims were made about the performance of the system with the reported number of destroyed trucks in 1970 exceeding the total number of trucks believed to be in all of North Vietnam. In reality, far fewer truck remains were ever identified, there were probably many false positives in target identification, and the North Vietnamese and their Laotian allies became adept at fooling the sensors. In spite of all this, the official statistics still trumpeted a 90 per cent success rate in destroying equipment traveling down the Ho Chi Minh Trail, an assertion difficult to sustain given that the North Vietnamese conducted major tank and artillery operations in South Vietnam in 1972. Edwards incisively observes that ‘Operation Igloo White’s centralized, computerized,automated, power-at-a-distance method of “interdiction” resembled a microcosmic version of the whole US approach to Vietnam’."