W. Bush wrote the group an outraged letter defending those who work for the government, including one Secret Service agent killed in Oklahoma City who had worked on Bush's detail in the White House.

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In other words, a secret agent of the Israeli government was responsible for activities at an opposition rally that have subsequently been cited by Mr. Rabin's widow and others to impugn its organizers.

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Called AVATAR (Automated Virtual Agent for Truth Assessments in Real-Time) and developed by the US government and the University of Arizona, an official figure (a man nicknamed Elvis) projected onto a screen conducts the interviews and can detect small changes in movement and behaviour to see if a traveller is telling the truth.

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They will use a bacterial agent that occurs naturally in soil and is authorised for the operation by Natural England, the government's advisor on the natural environment.

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