When the Minnesota Legislature legalized some types of fireworks this year, it set the stage for the arrival of an American institution long missing from the Land of Lakes: the roadside fireworks stand. Over the past few weeks, colorful tents have sprouted in parking lots, along highway shoulders, and on frontage roads. For just a few more days, the entrepreneurial spirit will live on under those canopies as self-starting salespeople hawk their remaining sparklers, fountains, jumping jacks, and whippersnappers. Minnesota Public Radio's William Wilcoxen has this report...