However, it is clear that Prevent work must be targeted against those forms of terrorism that pose the greatest risk to our national security.

And small efforts at patching and rejuvenating, if made early, can prevent major work later.

For single parents with few skills, the problems that prevent full-time work run the gamut.

It was given the green light in 1948 but financial difficulties prevented work from beginning until 1957.

But the workplace is full of interruptions that prevent work.

Further problems prevented work on the project from advancing beyond the 1864 stage for a decade.

High radiation levels from contaminated water prevented work.

But it would prevent work for a foreign entity by former members of executive, legislative or the judiciary for four years.

This will help focus work on the Agency's skills and knowledge without preventing work in other fields.

The First World War prevented much work being done and the official foundation stone was not laid until 1922.