The war on terror

Any terror attack on US citizens by muslims is answered by a large number of similar attacks on Islamic countries using drones. (A difference is that those muslim terrorists usually commit suicide or get killed after their cowardly attacks, while the heroic drone operators are safe.)
The escalation factor (see my previous post) on the muslim side is lower, due to lower resources. Maybe a thousand drone deaths radicalize enough young people to yield one successful terrorist attack.