It’s almost Christmas. But for millions of Virginians, worries about housing costs temper the celebrations. Nearly 3 in 10 Virginia households cost burdened, paying more than 30% of their income for shelter. This week, we look at how cities across Virginia - and America - have zoned their way out of 'missing middle' housing over the last 80 years. And what some cities in Virginia are doing to address the problem today.