Albert A. Gore III, the son of former Vice President Al Gore, was arrested last night in Bethesda, Md. for possession of marijuana.According to Montgomery County police, Gore was driving a dark-colored Cadillac through downtown Bethesda around 11:30 p.m. with the car's headlights off.Police officers who were conducting a campaign against impaired driving during the holiday season stopped the car and noticed that despite the freezing temperature, all the car's windows were open as well as the sunroof.When the officer spoke with the driver, Mr. Gore, he smelled the odor of marijuana coming from inside the car.When officers searched the...