States of Germany equivalent to those of the ministers in the larger states. The equivalent of the minister-president is the "Senatspräsident" (president of the senate) in Bremen, the "Erster Bürgermeister" (first mayor) in Hamburg, and the "Regierender Bürgermeister" (governing mayor) in Berlin. The parliament for Berlin is called the "Abgeordnetenhaus" (House of Representatives), while Bremen and Hamburg both have a "Bürgerschaft". The parliaments in the remaining 13 states are referred to as "Landtag" (State Parliament). The city-states of Berlin and Hamburg are subdivided into boroughs. The City of Bremen consists of two urban districts: Bremen and Bremerhaven, which are not contiguous. In the
Germany–United States relations exchange programs and projects, and focus on space exploration, the International Space Station, environmental technology, and medical science. Import cooperations are also in the fields of biochemistry, engineering, information and communication technologies and life sciences (networks through: Bacatec, DAAD). The United States and Germany signed a bilateral Agreement on Science and Technology Cooperation in February 2010. In the post-war era, a number of institutions, devoted to highlighting American culture and society in Germany, were established and are in existence today, especially in the south of Germany, the area of the former U.S. Occupied Zone. Today, they offer English courses as