Associated Press: A huge yet invisible cloud of volcanic ash from Iceland spread southward over Europe and eastward into Russia on Friday at the speed of a car in city traffic, meteorologists said. How far the volcanic ash spreads and when the microscopic dust will begin to disperse or settle on the ground depends entirely on two unpredictable events: How long the volcano beneath Iceland’s Eyjafjallajokull (ay-yah-FYAH’-plah-yer-kuh-duhl) glacier keeps pumping tons of dust into the air and what wind …