Famous spies, secret missions, and international drama — MI6 is at the heart of it all!

MI6 stands for the **Secret Intelligence Service (SIS)** and it is the official foreign intelligence agency of **Britain** (the United Kingdom). Its main job is to collect secret information from outside the country to protect national security. This information helps the British government make decisions on defense, foreign policy, and counter-terrorism.

The agency was formed in 1909, mainly to monitor threats from foreign countries, especially during times of war. Over the years, MI6 has played a key role in World War I, World War II, the Cold War, and modern-day intelligence missions across the globe.

MI6 is often associated with the famous fictional spy **James Bond** (Agent 007), although the real-life work of MI6 is far more complex and serious. In the real world, MI6 officers gather intelligence, build secret contacts in other countries, and work to prevent dangers such as terrorism, cyber attacks, and nuclear threats.

The agency works closely with other British intelligence services like **MI5**, which handles internal security, and **GCHQ**, which focuses on communication and cyber intelligence. MI6 operates under the British Foreign Office and reports directly to the government.

Unlike agencies such as the CIA (USA) or FSB (Russia), MI6 rarely reveals details about its operations. It keeps its missions and agents secret to protect both the country and its people.

The headquarters of MI6 is located in London and is sometimes referred to as the “SIS Building.” It has become a symbol of British intelligence, both in real life and in movies.

✅ Final Answer: Britain.