Night vision devices (NVDs) are optical instruments that allow for vision in the dark by detecting visible and infrared energy and providing a visible image. Although they are available to civilians, goggles and other NVDs are typically used by law enforcement agencies and the military. Introduced in the 20th century, NVDs have been used widely since the Vietnam War. They also played a key role in Operation Neptune Spear—the raid that killed Osama bin Laden. What was the “snooperscope”? Discuss
Source: The Free Dictionary