Leidschendam hosted the main office of the country's secret service, the AIVD, which is an integral part of the Dutch Ministry of the Interior, before the office moved to Zoetermeer in 2007. The building now hosts the UN Special Tribunal for Lebanon to try those suspected of assassinating former Lebanese Prime Minister Rafik Hariri. Voorburg hosted CBS "Centraal Bureau voor de Statistieken" Statistics Netherlands, the Dutch census office until mid 2008 when it moved to a new office in The Hague – Leidschenveen.