the metro links outlying neighbourhoods, or comunas, that werence the domain of drug lords, to the cityenter. vigilant staff help keep the public transit system safe and clean. camilo ruiz is one of the organizers of this special sightseeing trip. this is the first time the annual meeting of global shapers is being held in his home town. they are going to visit comuna trece, neighbourhood 13. built on a steep hillside that was once a slum, notorious for squalor, drugs, crime and brutal gangs. jeaneth perez holguin: there are many things that stay with you for life. such as losing family members, friends and neighbours in the conflict we had here. i myself lost an uncle, a cousin and a brother. it is really rough. >> comuna 13 is changing fast. infrastructure investment is helping to revive the district and the entire city. kids can play outside without fearing for their lives. esteban jaramillo: we want to make things better for society. there aren't just bad guys living in this neighbourhood, killers and dealers. there are people who hold down jobs, who work as cooks, actors, or dancer