Earth Day founder's 'living' building signals new era of sleek sustainability

In cloudy, drizzly Seattle, Denis Hayes, the environmental activist who organized the first Earth Day in 1970, is pulling the wraps off a six-story office building that generates all of its electricity via an oversized rooftop array of solar panels.A sun-powered building in Seattle is "formidable," Hayes told NBC News, but the Bullitt Center project aims to show it is possible in a visible, tangib...