The United Nations (UN) is an intergovernmental organization established after World War Two in 1945 to promote international co-operation and maintain international security.
The UN has 193 members and its headquarters are in New York City. Its objectives also include promoting human rights, fostering social and economic development, protecting the environment, and humanitarian aid. It is financed through contributions from its member states.
President Hassan Rouhani is determined to strengthen Iran's missile capabilities, brushing aside criticism from the US. Friday's speech to soldiers marked the anniversary of the outbreak of the Iran-Iraq war in 1980.
Germany's Foreign Minister Sigmar Gabriel has warned against focusing on national interests in his speech at the UN General Assembly. Gabriel has also called for a diplomatic solution to the North Korea crisis.