The GSG9, which stands for Grenzschutzgruppe 9 (Border Protection Group 9), was set up in 1972 after regular German police failed to rescue Israeli hostages kidnapped by Palestinian terrorists at the Munich Olympics. Its formation was controversial, with some politicians in Germany feeling the group was reminiscent of the notorious Nazi SS.

The GSG9's very first mission, called "Operation Fire Magic," established its high reputation. After Palestinian terrorists hijacked a Lufthansa plane in 1977, the GSG 9 managed to rescue passengers in a seven-minute operation in Mogadishu. A GSG 9 member and a flight attendant were injured, while three of four hijackers were killed. Sadly, the pilot was killed before the operation took place.

Ulrich Wegener, who was a founding member of GSG 9, received an Order of Merit from the German government after the successful mission. Wegener, who became known as the "Hero of Mogadishu," died on December 28, 2017, at the age of 88. He was always uncomfortable with his popular title, saying recently: "We did the work together."

The GSG 9 goes into action in hostage situations, in cases of terrorism and to undertake bomb disposal. But it is also deployed to secure locations, as here ahead of the 2007 G8 summit in the northern resort town of Heiligendamm.

Most of the GSG 9's missions are confidential, but it is said to have participated in more than 1,900 operations since being founded. It is currently based in the western town of Sankt Augustin, near Germany's former capital, Bonn.

The GSG 9 members undergo rigorous training for all eventualities. Here, they practice dealing with an attack by armed terrorists on a railway station. Plans are now underway to expand the unit by a third and give it another headquarters in the capital, Berlin. Although the number of members is kept a secret, media currently put it at around 400.