This technique has allowed Graham to raise the alarm early and often about potentially dangerous drugs.
Since environmentalists first began to raise the alarm about greenhouse gases, oil companies have tended to react by circling their wagons.
Mr Bacon was left banging the floor of his hallway with his walking stick for half an hour to raise the alarm.
Ian Flitt, the father of Ms Chambers' 10-year-old daughter who escaped the house to raise the alarm, paid tribute to his former partner.
Khyra Ishaq was seven when she starved to death in Birmingham, even though her school and neighbours had tried to raise the alarm.
Jayne McCubbin, BBC correspondent at the scene, said the family tried to raise the alarm but "there is no mobile phone signal in this area".
BBC: Buxton river crash: Man dies after family cars overturn
The liberal quartet of Justices, recognizing that their position was probably hopeless, did their best to raise the alarm with the public, if not with their colleagues.
Supt Purcell said two had fallen into the canal and another went in to try to get them out while the fourth ran home to raise the alarm.
BBC: Kidderminster canal plunge: Imie Harrison named by police
Head teachers have told ASCL this can take up to two hours, whereas in the past many schools would have been able to raise the alarm about a pupil over the telephone.
"Of all the things that Amanda did that day, nothing attracted more criticism than her failure to raise the alarm as soon as she saw so many things out of place, " he writes.
Rather than simply the actions of a few doctors, the problem had developed because there were no checks and balances in place to raise the alarm when things first started to go wrong.
In one editorial, Cleveland Clinic cardiologist Eric Topol , who was the first to raise the alarm about Vioxx three years ago, calls for a formal government investigation into how Merck (nyse: MRK - news - people ) and the U.S. Food and Drug Administration left Vioxx on the market for so long after concerns about its possible heart risks had been raised.
He was taken to a vacant house in the Beechmount Parade area of west Belfast and remained there until shortly before 09:30 GMT when he managed to escape and raise the alarm.
The security guard, who was not injured, managed to free himself and raise the alarm shortly after midnight.
The developers of the network, based at the University of Manchester in the UK, see its primary use in care homes or hospital wards, to raise an immediate alarm in the case of a fall.
He said councils had a statutory responsibility to ensure that all children in their area had access to a good education so should also raise the alarm if academies were underperforming.
Recent studies raise renewed alarm about the threats to reefs.
Will you sneak around and use your detective skills to find the correct target, or will you raise the alarm and cut down everything in your path?
It may not be time to sound the alarm, but it is certainly time to raise a caution flag.
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