(Updated at 2:55 p.m.) Arlington County (Va.) Police and federal agents are searching for a man who threw a Molotov cocktail-like incendiary device inside the Ballston Common Mall. The man threw what was described as a “flaming bottle” from an upper level of the mall down to the food court. The device, said to be 40 ounce beer bottle, possibly containing gasoline or a similar substance, shattered on impact but did not explode, according to Arlington County Police spokesman Dustin Sternbeck. No one was injured. Two to three additional bottles, which “smelled like gasoline,” were found in a bag by...