If you're watching fireworks tonight, here's how you can tell you're looking at a top-shelf display and not some cut-rate carnival sideshow. Look for the blue fireworks. Are they true blue, not pale or purple or mauve?
The color blue has been the Holy Grail for pyrotechnics experts since fireworks were invented more than a millennium ago. It's by far the hardest color to produce. But why? For that, we turn to John Conkling. He's technical director of the American Pyrotechnics Association. John Conkling, welcome.
Egypt is about to get a new ruler. A caretaker head of state is being ushered into power Thursday following Wednesday's dramatic military coup. President Mohammed Morsi was forced from power just a year after winning the country's first free election. He lost the public's trust amid a failing economy and fears that he was imposing an Islamist agenda.
And the Federal Communications Commission has apparently approved a deal giving the Japanese telecom giant SoftBank a controlling stake in SprintNextel, which is the third-largest wireless operator in the U.S. Experts say SoftBank's industry clout should help Sprint become a more robust competitor. NPR's Wendy Kaufman reports.
And a remembrance, now. The, a computer visionary best known for inventing the mouse has died. As NPR's Laura Sydell reports, the mouse was just one small piece of what Douglas Engelbart contributed to the development of personal computers.