A German riot policeman stands guard in front of the nuclear power plant of Philippsburg, near Karlsruhe, in the German state of Baden Wuerttemberg, in a April 8, 2001 file photo. The head of the International Atomic Energy Agency said on November 1, 2001 that the ruthlessness of the September 11 attacks showed that an act of nuclear terrorism was "far more likely" than previously thought. —REUTERS