81.   Reports on Friday said that Coordinating Minister of Political and Security Affairs Susilo Sudarman had called on Indonesians to act to prevent violence that threatens national unity.

82.   Separatist leaders have said they will act to prevent fighting in Chechnya before the second round of the presidential elections.

83.   The former Yugoslav leader had only been acting to prevent the break-up of Yugoslavia and Serbia in the face of separatism, argued Borislav.

84.   The king appears to have acted to prevent his father, ex-king Moshoeshoe II, from being investigated by a commission of inquiry set up by Mokhehle.

85.   The pill acts to prevent pregnancy after unprotected sexual intercourse by delaying ovulation or preventing fertilization and implantation.