Farc pledges to halt all military operations and acts of sabotage in runup to peace discussions in Cuban capitalColombia's main rebel group has announced a unilateral ceasefire before much-anticipated peace talks with the Bogota government, in Cuba.The announcement was made by Revolutionary Armed Forces of Colombia (Farc) delegates in Havana, the venue of the landmark talks.Iván Márquez, the group's chief neogotiator, said Farc would stop military operations and acts of sabotage against government and private property from midnight on Tuesday to 20 January."This policy decision of the Farc is a contribution made to strengthen the climate of understanding necessary so that the parties that are starting the dialogue achieve the purpose desired by all Colombians," said Márquez as he arrived for the talks.