The American Baby Boomer has become an easy target. In recent years, the generation has been blamed for soaring home prices, stagnant wages, student debt and widening inequality. Critics accuse them of clinging to wealth and power , of building a ladder and pulling it up behind them. But on a construction site in Minnesota ’s Twin Cities, a group of retirees is quietly challenging that narrative. Every Thursday, a crew known as the Third Act shows up to build homes with Twin Cities Habitat for