Designing and building nuclear bombs is one of the U.S. government’s most secretive activities. But the PBS NewsHour recently was granted unprecedented access to a number of highly classified facilities, where the world’s most destructive weapons are now being updated…

Green technology can take many forms, be it in eco-friendly light bulbs, hybrid cars, or wind turbines. It can even take the form of homework, as in the case of students competing in the Department of Energy's "Solar Decathlon."…