 Thank you. Good afternoon. Thank you for the invitation and the to the urban age organization. It's my pleasure to be in this Ababa for the first time. I will explain to you some ideas of the process of the transformation of Medellin that has happened in the last 20 years. Maybe we could put the... okay. Medellin is located under those clouds in this narrow valley. I must say that many things happens under the clouds. Bad ones and good ones. Colombia is located in the northern part of South America and in it converge the most exceptional ecosystems. It connects the Caribbean, the Pacific, the Andean mountains and the Amazon, making it an exceptional spot of global biodiversity. At the same time Colombia is a country of cities. Today 78% of the population are living in our cities. Medellin has 2.4 million inhabitants and 3.5 millions in the metropolitan area. 70% of the current house in stock has informal origin. Medellin are 2 in 1. From above they see us and from below we see them. Medellin is one but with a broken spirit. This is the voice of Fernando Ajejo, one of our best writers. During the 80s and 90s we were the capital of the drugs cartels because of that we were living in 1991 in the most violent city on earth. On the map you see on the brown tones the slopes of the north the city that has informal origin and in yellow the formal city, the south, two different realities. The violence increases dramatically this separation. So the question was how to turn it around. I will, I will, I wanted to share with you some principles. Public spaces and infrastructure of inclusion. Intervening into urban borders, transforming into site of knowledge and exchange. Violence separate, exclusion separate. It's about where to act, for whom, about the quality and the beauty, about the meaning. The processes. Medellin transform municipal bureaucracy, bringing public design intelligence into city planning. Has the capacity to coordinate, be strategic. This is the most difficult challenge for politics and politicians. It means that you need to transform the traditional politicians and the coordination in the administration. So how to act and where? Interventions. Public spaces and infrastructure of inclusion. Intervening into urban borders, transforming into sites of knowledge and exchange. This is the historical Comuna 13 in Medellin, where the Orion battle happens in 2002. This is one of our historical borders. In the aerial view you see on the left the informal neighborhood and on the right the formal one. The yellow line marks the border. We located in this strategic yellow border the integration of the metro station with the teleferico, the new public transport system. Going up to the hill and the new library park, the new public for facilities close to the station, the public school is a confluence of new public spaces and programs. The idea of social urbanism looks for a converge of integral programs that combines infrastructure and social cohesion, education, culture and innovation. On the map on the right are six strategic sites of interventions. The city develops them between 2004 and 2012. In the image of the left is the plan of the first urban integral project connected with the first corridor of the cable car, the integral system of mobility, metro, cable car, trainway that connects those strategic areas. Politics has to change. The mathematician Sergio Fajardo won the most municipal election in 2003. His sketch, the idea to increase the door of opportunities and reduce the door of legality. This is the map of opportunities, the different programs of the government in this strategic zone. The urban design and architecture develop and connect a sequence of the new public spaces and the programs of education, culture and innovation. You see the station of the telephorical, the Rambla under the telephorical, the new bridge that connects the new housing program, the library in the upper part. A sequence of itineraries that improve the quality of life helps the people with the everyday life. But the innovation continues. The urban design and the following governments continue this narrative of innovation and social infrastructure, like the transformation of the network of more of the 30 water reservoirs into beautiful and cultural community centers. One of the best examples is the new north, the second strategic area. The Barrio Moravia in the 80s on the left was the municipal dump site. Today, one of the right, the confluence of new spaces, Explorer Science Museum, the public park on the Botanical Garden, the Carabobo Rambla and on the right out of the image, the metro station and the Desire Park. During the year, some of the most beautiful moments happen here, like the book fair, when all the places are open and connected for all. But is this transformation sustainable? This was the question that you wanted to finish. Is this transformation sustainable? The inequality is still there. We need at least 20 more years of the continuous policy to open the door of opportunities for the majority. But continuity is always fragile in our context. Every government wants to leave his signature, not talking about corruption. Even so, I am optimistic. There is a continuity with the bigger narrative in Medellin, the narrative of infrastructure of inclusion. The spaces of the city are more transparent, fluid, connected and less invisible. The ecosystem is more robust, solid and active. Today, there are a dynamic platform of partnerships. You see in the image, Fernando Zapata, that is one of the leaders in our communities. He was working with us and studying our master program in Urbama, our centre of urban and environmental studies. We are very proud of his initiative. He is starting a very powerful network for the community in the informal hills of Medellin. Thank you. Thank you. Thanks so much, Alejandro. And just to put a marker for all of us to think about, well, we move on. Thank you. And we, Heung Min goes up to speak. Just to put out there, Alejandro raised this question of the relationship between design, the wider urban management system and broader inequality. And I'd really like us to come back and think about which of those drives, which of those follows and the relationship between presence and the thinking about the city and about urban change.