Drones have been flying over critical civilian and military sites around the United States for years. Why is it so hard for the military to stop them?

And they have bright landing lights. Drones flying at night are only required to have one bright, anti-collision light that’s visible 3 miles (5 kilometers) away. But drone owners can add other ...

And they have bright landing lights. Drones flying at night are only required to have one bright, anti-collision light that's visible 3 miles (5 kilometers) away. But drone owners can add other ...