NEWARK — New Jersey Gov. Chris Christie knew about the George Washington Bridge lane closure scandal while it was taking place, according to federal prosecutors making their opening statements Monday morning in the trial of two former allies of the governor accused of creating gridlock in Fort Lee to punish the town’s mayor for not endorsing Christie’s 2013 re-election.The governor, who has denied any knowledge of the scandal until months later, was told about the lane closures at a Sept. 11 memorial service at the World Trade Center in 2013, three days into the closures, prosecutor Vikas Khanna told jurors.Khanna said that Christie was told by Bill Baroni and David Wildstein, two former officials at the Port Authority of New York and New Jersey, which owns and operates the bridge.