Administration backers acclaim the Drug Wars concept as a foolproof and impregnable barrier against drug trafficking from abroad.
Long a separate culture when the mountains formed an almost impregnable barrier, this Berber region recalls the sweep of the American Southwest.
As Hugh Aldersey-Williams points out in "Anatomies: A Cultural History of the Human Body," even television cartoons portray the skin as a rubbery and impregnable barrier.
Orders were issued for each ship to attach strong cables to the bow and stern of their neighbours, which would effectively turn the line into a long battery forming a theoretically impregnable barrier.
Despite standing aside from the invasion and being excluded from the subsequent administration, the U.N. found itself a prime target of Iraqi guerrillas, and a particularly vulnerable one because relief and reconstruction work cannot be carried out from behind impregnable barriers.
Dr. Coyle, the former director of nuclear testing at Livermore, said small tests were more likely to leak radioactivity than large ones, because the intense heat and gigantic shock waves of bigger blasts tended to melt and pulverize nearby rock into impregnable barriers.
The continent was cut in half by a vast, impregnable military barrier, passing along Hungary's western border.
If even the most seemingly impregnable of such barriers are laid down, hackers will be able, with time, to build a higher ladder.
He assesses Israel's recent partial liberalization and the emergence of what he deems a "creeping apartheid" whereby increasingly impregnable ethnic, geographic, and economic barriers develop between groups vying for recognition, power, and resources.
The checkpoints have now been made virtually impregnable; they consist of a series of three or four concrete barriers, five feet high and a yard thick, arranged in a slalom pattern; each barrier has two opening a narrow one, to accommodate pedestrian traffic, and one that is just wide enough to permit the passage of conventional civilian and commercial vehicles.
The checkpoints have now been made virtually impregnable; they consist of a series of three or four concrete barriers, five feet high and a yard thick, arranged in a slalom pattern; each barrier has two opening — a narrow one, to accommodate pedestrian traffic, and one that is just wide enough to permit the passage of conventional civilian and commercial vehicles.
