No country has more than one US Embassy. Many have multiple US Consulates. Sometimes the Immigrant Visa Unit works out of the Capital City where the embassy is, but very often not. No country has more than one US Immigrant Visa Unit. Canada, China, India, Mexico and many others are examples of countries that have the IV Unit at a Consulate instead of the Embassy. Mozambique, is an example of a country without a US IV Unit, so they interview in Johannesburg. Iran has no US US Embassy or Consulate, so Iranians interview in Ankara or Abu Dhabi.