He had been so adept at nullifying prior attacks that Sos was sure the man was at least partially familiar with weaponless techniques.

However they were sentenced the same day to serve prison terms of 6, 8, 11 and 3 years respectively for their involvement in prior attacks.

To Kirk's practiced eye, the damage suggested a fairly low-level explosive, commensurate with Lorini technology and the prior attacks.

"That means that prior attacks, bites and even barking viciously could be considered evidence of vicious propensities in a dog," Mr. Higgins said.

But given the prior attack, with the enemy aircraft evidently hiding itself as a commercial flight, the profile was more than unsettling.

"They can identify attacks based on signatures of prior attacks, but if someone comes up with a new attack, it will blow right by them."

The police were searching for her companion, Latta Douglas, 42, because of a series of prior attacks by him, a spokesman said.

When he enters the town, he finds that its residents hold him in utter contempt for the prior attack on their town.

Since July 2004, TSA has provided supplemental personnel, including federal air marshals, to assist mass transit systems during major events, holidays, and anniversaries of prior attacks.

Unfortunately the Polish defenders had been alerted by the prior attack in the Beskids, so that it was impossible to capture the tunnels before the explosives were detonated.