MI6, officially known as the Secret Intelligence Service (SIS), is the United Kingdom's foreign intelligence service. Its primary role is to gather intelligence from outside the UK to support the country's national security and foreign policy objectives. MI6 operates under the authority of the Foreign, Commonwealth & Development Office and works closely with other intelligence agencies, including MI5 and GCHQ. Founded in 1909, MI6 has played a crucial role in various historical events, including both World Wars and the Cold War. The agency is known for its covert operations and intelligence gathering, often involving espionage and surveillance. Its headquarters is located at Vauxhall Cross in London.