It started with a murmur. Marco Materazzi uttered something to Zinedine Zidane and the Frenchman snapped - violently planting his head into the Italian's chest. The referee flashed his red card and Italy won the 2006 World Cup. It's the headbutt no football fan will ever forget. Twelve years on, FFT speaks to those in the stands and in the dugout to find out the truth behind one of the World Cup's most shocking moments.