Drone strike

A drone strike is an attack by one or more unmanned combat aerial vehicles or weaponized commercial unmanned aerial vehicles (UAV). It usually involves firing a missile or releasing a bomb at a target. The drone may be equipped with such weapons as guided bombs, cluster bombs, incendiary devices, air-to-surface missiles, air-to-air missiles, anti-tank guided missiles or other types of precision-guided munitions. 
Since the post-9/11 era, the United States have used drone strikes in such countries as Afghanistan, Pakistan, Syria, Iraq, Somalia, and Yemen using air-to-surface missiles.
Drones strikes are used for targeted killings by several countries. Drone strikes are used to in also, but also cause significant civilian casualties and often are directed at dissidents and journalists inconvenient for their users.