Drones, a device which needs to be told exactly where to go and what to do at all times. They are effective, but their methods are coarse: an explosive device meant to target one person could also harm others. Regardless, it's state-of-the-art precision target will help eliminate many enemy targets, thereby improving national security.
And such drones strikes can not tell us whether or when targeted killings are morally defensible but they do tell us that our moral judgments can be affected by factors that arguably shouldn't be relevant to our actual decisions. Does it matter whether you push a button or a person if the outcome is the same?How different is a drone strike vs human assassin?