Mr Barak has been involved in several special operations

In 1973, as a young soldier, Mr Barak was part of an elite commando force sent to Lebanon to kill three members of the Black September group, involved in the massacre of Israeli athletes during the Munich Olympics.

He entered Lebanon dressed as a woman.

Fifteen years later General Barak planned and co-ordinated the killing of the PLO military commander, Abu Jihad, in Tunisia.

Failures

But not all such operations were successful.

The last known assassination attempt three years ago ended in humiliating failure.

Two Mossad agents were arrested in Jordan following an attempt to poison a leading member of the fundamentalist group Hamas.

This latest attack may have killed the targets but also left two innocent civilians dead and many more injured.

The official line is that the helicopter gunship attack should act as a deterrent to the militias and help reduce the violence.

It may play well with Israeli public opinion but with Palestinian leaders outraged and threatening retaliation this killing may prove counterproductive, increasing the vicious cycle of violence.