The most wide-ranging missions are: Barrio Adentro (primary health care), Robinson I and II (literacy and primary education), Ribas (secondary education), Sucre (higher education), Mercados de Alimentos Mercal (a food programme that in September 2008 distributed foodstuffs to 48% of the population), Vuelvan Caras (training in production and the running of cooperatives) and Habitat (land, housing and urban projects). As recently as 2005, there were heated protests against fuel price hikes in which campesinos and a large number of residents of the city of El Alto participated. These movements culminated in a transition government, which temporarily eased tension by nationalizing gas and petroleum and calling for a constituent assembly.