The Aircraft Rescue and Fire Fighting, or ARFF, vehicle crossed Runway 15R at Baltimore-Washington International Thurgood Marshall Airport (BWI) without authorization on Jan. 12, DC News Now said Tuesday. The Southwest Boeing 737 had just been cleared for takeoff from the same runway and missed the ambulance by less than half the length of a football field, the outlet reported. “The closest estimated horizontal separation occurred at a distance of 173 feet,” the Federal Aviation Administration said in new analysis of the harrowing incident. The ARFF driver was told to “hold short” of the runway, but read back the instruction...