Angola is a major business partner mainly in the area of natural energy resources; Angola is the major supplier of oil and natural gas to São Tomé and Príncipe. In addition, hundreds of Angolan tourists visit São Tomé and Príncipe every year, contributing to the local economy. There is a relatively large community of Angolans in São Tomé and Príncipe. São Tomé and Príncipe maintains an embassy in Luanda and Angola maintains an embassy in São Tomé.Santomean personnel undergo medical training with US Naval corpsmen