Former Colombian candidate for vice-president Clara Rojas (R) greets her mother Clara Gonzalez de Rojas as she arrives at Caracas' Maiquetia airport after being released by the FARC guerrilla who held her hostage for six years January 10, 2008. REUTERS/Miraflores/Handout (MEXICO). EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.