A host of new laws take effect in Missouri on Wednesday, including one that comes from years of effort by one Kansas City-area family.SB 754, better known as Blair’s Law, outlaws “celebratory” gunfire statewide. Prior to its passage, it was up to a city ordinance. Now, that crime will be escalated to a state offense, which means harsher penalties for those involved. It’s been just over 13 years since Blair Shanahan Lane was dancing with friends and family members celebrating the Fourth of July. Then, someone celebrating the holiday fired gunshots into the air.What goes up must come down. Blair was struck and killed by one of those bullets. Blair’s mother, Michele Shanahan DeMoss, worked for more than a decade to push for stiffer laws against celebratory gunfire. “A bullet travels a long way, whatever way you fire it recklessly,” she said. “Firing a gun is not acceptable. And, you …