 Complete the following phrase:  The 2011 RB7 built on the RB6s speed and also proved to be reliable, making it the clearly domit car in the pack. The car took 18 of the 19 pole positions and won 12 races. On 9 October 2011, Red Bull won the World Drivers Championship, making Sebastian Vettel the youngest double champion in the history of F1. Red Bull followed up this title with securing the Constructors Championship on 16 October at the 