BOGOTA, - Colombian armed group Segunda Marquetalia agrees unilateral ceasefire Colombian armed group the Segunda Marquetalia on Sunday agreed to a unilateral ceasefire, after several days of peace talks in Caracas, which are part of President Gustavo Petro's efforts to end 60 years of unrest in his country. The Segunda Marquetalia is a dissident faction of the now-demobilized Revolutionary Armed …