motorist who allegedly brandished a gun at another driver. Turns out the driver who displayed the handgun was an agent for the Bureau of Alcohol, Tobacco, and Firearms, a State Patrol report said. The incident began about 6:40 a.m. on eastbound I-694 in Brooklyn Park, where a motorist called police to report that another driver was displaying a gun. The motorist followed the gun-toting driver east to I-94, and then south on I-94 into Minneapolis. Police caught up to that driver on I-94 at Olson Hwy. and blocked two of the southbound lanes for a short time while making an...