Today, a story about one street in one neighborhood in one of America’s highest-profile cities, and the $23.9 million grant meant to transform it. It’s a 4-mile stretch of Stewart Avenue in East Las Vegas, where more than a quarter of the residents live below the poverty line. But upgrades — like improving bus stops, adding bike lanes and planting trees — could have big implications for the community. It’s part of our series “Breaking Ground,” where we look at how federal  infrastructure spending might change the economy.