(Bloomberg) -- The pilots of the US Army helicopter ... wearing night-vision goggles at the time of the accident. Preliminary ...

"Flying into that airspace, it is super busy. There is so much moving around. There's darkness, blinking lights, and a lot of movement," the pilot says. "In that environment, the night vision ...

Three days after the midair collision of an Army helicopter ... time if the night vision goggles were actively being worn," he said. Preliminary data shows the Black Hawk was flying at an altitude ...