Once hidden, they advise people to remain quiet, silence their phones and then phone emergency services.
Plastic surgery is thriving in a country where bodies were once hidden in drab Mao suits.
(In those days, false nuclear alarms were set off by radium watch dials, once hidden in a woman's corset).
Their lives, once hidden within the compound of the breakaway Mormon sect, were suddenly the stuff of national news.
At the same time, on the social front, people with genetic anomalies who were once hidden away in darkness and left to die young are writers, actors, activists.
The site, he said, was where a large portion of China's imperial treasures were once hidden inside several big wooden sheds.
What they did not bargain for was the arrival this summer of a clutch of people, eager to sift through the tons of gravel for flakes of gold once hidden behind the dams.
And when we see those actual crutches, or images of Roosevelt being supported, it is not to emphasize what was once hidden but to reveal the heroic aspect of his private life.
The light blue color was deduced by analyzing faded paint chips once hidden under the stucco, since the only photo of the original, taken in 1939, was in black and white.
The result: an important desire to reveal what was once hidden ends up pulling down nearly everything else, leaving a landscape as starkly unreal as the one in which Washington could never tell a lie.
Iran, caught last year in a web of nuclear deceit, has grudgingly "suspended" its once hidden uranium-enriching activities (enriched enough, uranium, like plutonium, can form the fissile core of a nuclear bomb) and agreed to more intrusive IAEA inspections.
