We begin with america's secret war. Those escalating drone attacks in the air and the consequences on the ground. And the question -- is it making the united states safer? Abc's chief global affairs... See More
We begin with america's secret war. Those escalating drone attacks in the air and the consequences on the ground. And the question -- is it making the united states safer? Abc's chief global affairs correspondent martha raddatz tonight traveled to the middle east and brings in this report. Reporter: It is a secret war. And just today, in a sign of how pervasive and how hidden it is, the revelation that america has a secret base in saudi arabia -- used to launch drones throughout the region. A tactic against terror which has grown 700% under the obama administration. Whatever the benefit of the drone strikes, they have created enormous resentment among some here in the region, who view the strikes as another sign of american arrogance. Everywhere I travel, from yemen -- I think americans, they are not right. They have no right to -- it is our fight. Reporter: To pakistan. You can keep saying, yes, you are hitting the top leadership, but the byproduct of this is anger, anger among people, the innocent people who are getting killed. So, you are just creating more terrorists. Reporter: Now, the man who signs off on the kill list, from a basement office in the white house, john brennan, about to be questioned in front of the world. I suggest to you that these targeted strikes are indeed ethical and just. Reporter: In pakistan alone, there are been more than 300 drone strikes in the last decade. Killing thousands of al qaeda and taliban, but more than 300 civilians, as well. A world away, in remote villages, you can hear them. Like a distance, muted chain saw. A dull, but deadly roar. Villagers describing it this way. "The drones are all over my brain. I can't sleep. When they're hovering over us, we're all scared." A reality we seldom see, says stanley McChrystal, the retired general who once ran the military's drone strike program. If we are too casual about it, then we will forget how much scar tissue we build up in those countries. Reporter: The general believes that americans should have the opportunity to know more about these secret drone wars, to weigh those benefits and risks. That rare opportunity will occur tomorrow, when john brennan speaks, diane.
This transcript has been automatically generated and may not be 100% accurate.