We mourn Hans Mezger. The constructor died yesterday at the age of 90 years. We owe him not only the air-cooled six-cylinder boxer engine of the Porsche 911, but also the overall construction of the Porsche 917 and its twelve-cylinder engine. For more than three decades, Hans Mezger was responsible for Porsche's most successful race cars and racing engines. We thank Hans Mezger for his extraordinary engineering achievements and for everything he did for us. Not only will his innovations and achievements remain unforgotten, he will also be remembered as a friend and colleague. In these difficult hours of farewell, all our thoughts are with his family.