MONACO - Mark Webber kept a five-car train at bay in tricky conditions to secure the second Monaco Grand Prix victory of his career and become the sixth winner in as many races in the 2012 Formula One season.That statistic is unprecedented in F1 history, but Webber’s win did make Red Bull the first team to notch up a repeat win this year.Mercedes driver Nico Rosberg was second, while Fernando Alonso completed the podium for Ferrari and now leads the world championship. Sebastian Vettel in the second Red Bull, Lewis Hamilton’s McLaren and Alonso’s team-mate Felipe Massa rounded out a very close top six.Pole position starter Webber held off Rosberg’s Mercedes away from the grid, then remained ahead through the sole pitstop sequence, despite Rosberg going for fresh tyres earlier.Vettel brought himself into contention by getting up to sixth at the start, then stayed out until lap 45 before switching from softs to the super softs that everyone else had started the race on.