(3 Mar 1999) Spanish/Nat Scores of mothers of kidnapped soldiers and police in Colombia have chained themselves to railings in Bogota's main square. The mothers are demanding the resumption of the peace talks between the government and the guerrillas from the Revolutionary Armed Forces of Colombia - the FARC. Before the talks were suspended both sides were discussing the exchange of kidnapped soldiers and police for jailed guerrillas. They have once again taken to the streets determined to get