Their first known attack was on the holy island of Iona in 794, just 40 miles west.

The most known attacks were those done by Zeppelins over England through the course of the war.

He said: "Never continue using a broken primitive only because the known attacks seem impractical today."

His first known attack was the bombing of a synagogue in 1977.

Of course, key search is not the most efficient known attack.

This exercise lets the person who is being trained practice techniques of self-defence against a known attack in a controlled way.

Its advantage is simplicity of adding known attacks to the model.

The first known attack relied on the trusted client problem.

Intelligence authorities characterized it as the first known attack by terrorists against a country's computer systems.

His last known attack occurred exactly two years ago today, the police said.