Alonso turns pole into victory at the 2012 German Grand Prix

Fernando Alonso led from pole position to chequered flag to win the German Grand Prix for Ferrari on Sunday and extend his lead at the top of the Formula One championship to 34 points.Germany's world champion Sebastian Vettel finished second for Red Bull, overtaking McLaren's Jenson Button on the penultimate lap in a controversial move that stewards were investigating.Vettel, who has yet to win