The first phase of the UNOSAT Challenge has just ended. The UNOSAT Challenge is the important Phi-Unet (ESA) contest for UNOSAT (United Nations) in partnership with ESA, RUS COPERNICUS, UNOSAT and with the technical support of CERN openlab. The aim of the contest is to put artificial intelligence and Earth Observation data at the service of a humanitarian cause: support the Iraqi government in planning reconstruction activities. In the first phase, candidates were asked to create an artificial intelligence model to identify urban areas in some Iraqi territories, working on data provided by ESA and the German Space Agency (DLR). At the end of this phase, 5 teams were selected.