Technology. Now with relatively cheap drones you can have surveillance, bomb delivery, and you can mostly hide and not risk your operatives loosing their lives.

Technology. Now with relatively cheap drones you can have surveillance, bomb delivery, and you can mostly hide and not risk your operatives loosing their lives. Before there was the annoying bit of having to brainwash them to blow themselves up along with the bomb they where delivering on foot, by car or boat.