"The use of unmanned aerial systems—commonly referred to as drones—over the past decade has revolutionized how the United States uses military force. As the technology has evolved from surveillance aircraft to an armed platform, drones have been used for a wide range of military missions: the United States has successfully and legitimately used armed drones to conduct hundreds of counterterrorism operations in battlefield zones, including Afghanistan, Iraq, and Libya. It has also used armed drones in non-battlefield settings, specifically in Pakistan, Yemen, Somalia, and the Philippines."