Today they are often used as police and military guard dogs because they are tough, fearless and most of all silent. (bulldogmixes.com)
In addition to being a great companion and home guard, he is a leading police and military guard dog. (my-favorite-dog.com)
In a building flanked by military guards, systems scientists from CALSSE sit around a large conference table, explaining to Science the complex diagrams behind their studies on controlling systems. (sciencemag.org)