A tiny light-emitting diode, or LED, attached to a self-guided bullet at Sandia National Laboratories shows a bright path during a nighttime field test that proved the battery and electronics could survive the bullet's launch. Courtesy of Sandia National Laboratories Take two Sandia National Laboratories engineers who are hunters, get them talking about the sport, and it shouldn’t be surprising when the conversation leads to a patented design for a self-guided bullet that could help war fighters. Sandia researchers Red Jones and Brian Kast and their colleagues have invented a dart-like, self-guided bullet for small-caliber, smooth-bore firearms that could hit...