Sweden remains non-aligned militarily, although it participates in some joint military exercises with NATO and some other countries, in addition to extensive co-operation with other European countries in the area of defence technology and defence industry. Among others, Swedish companies export weapons that were used by the American military in Iraq. Sweden also has a long history of participating in international military operations, including Afghanistan, where Swedish troops are under NATO command, and in EU-sponsored peacekeeping operations in Kosovo, Bosnia and Herzegovina, and Cyprus. Sweden also participated in enforcing a UN mandated no-fly zone over Libya during the Arab Spring. Sweden held the chair of the European Union from 1 July to 31 December 2009.