So the evil of Riyadh will learn the meaning of American justice. President Bush's message may have played well in Texas. Potential suicide bombers in Saudi Arabia are unlikely to take fright - or flight. They have, after all, grown up with a justice system where public beheading and the amputation of hands and feet are quite normal. Nobody should be surprised that al Qaeda has regrouped within the country which produced it in the first place. The men who flew jets into the Twin Towers were apostles of Wahhabism, a strain of Sunni Islam that was born in the Arabian peninsula, helped bring the house of Saud to power, and which underpins life in the kingdom today.