Sometimes when researching my books my various interests pleasantly collide. Yesterday while reading up on US Army installations in Cold War Berlin, I discovered a fascinating link between Cold War Berlin, Nazi Germany and Formula 1. The Automobil Verkehrs and Übungs-Straße (AVUS, Automobile Traffic and Practice Road) was a highly unusual racing circuit, originally 12.6 miles long and comprising just two 5.5 miles long straights (two lanes width each side) and a hairpin bend