Humanitarian aid is seen as "a fundamental expression of the universal value of solidarity between people and a moral imperative". Humanitarian aid can come from either local or international communities. In reaching out to international communities, the Office for the Coordination of Humanitarian Affairs (OCHA) of the United Nations (UN) is responsible for coordination responses to emergencies. It taps to the various members of Inter-Agency Standing Committee, whose members are responsible for providing emergency relief. The four UN entities that have primary roles in delivering humanitarian aid are United Nations Development Programme (UNDP), the United Nations Refugee Agency (UNHCR), the United Nations Children's Fund (UNICEF) and the World Food Programme (WFP).