21.   The attack stunned Japan, which had thought of itself as safe from urban terrorism.

22.   The explosion was being investigated by detectives attached to Operation Good Hope, formed earlier this year to investigate urban terrorism.

23.   The rebels, currently being mauled in a government offensive, have never shown a capability for urban terrorism.

24.   Urban terrorism was nearly beyond the realm of imagination.

25.   The Khmer Rouge has not engaged in urban terrorism in recent years and government officials have provided little proof of the existence of the group.