Just where is the authorization for war in Pakistan? There is none of course, just the broad 2001 joint Congressional resolution given to then President George W. Bush granting him the authority to use all "necessary and appropriate force" against those he determined "planned, authorized, committed or aided" in the 9/11 attacks or "who harbored said persons or groups", (to which President Obama is still using as his justification for the expanded use of drones against the Taliban in Pakistan).
As for the use of these American drones in Pakistan (as well as Yemen and Somalia) the American public endorses their use with a 70% approval rating.
Apparently with fewer Americans actually reported dying in our wars, the deaths of foreigners by our drones is not only tolerated it's pretty much given the seal of approval. It seems to most Americans, there's little difference or concern whether its innocents or militants being killed.
To the Pentagon and the American war industry the use of drones and the increasing growth in the number of "enemy" militants justifies our endless war against them.
It's an American made self perpetuating operation. When there's no real "enemy", just concoct
one. And terrorists and terrorism are the perfect foil for America's endless war.
Happy New Year!
 "Drone War Spurs Militants to Deadly Reprisals" by Declan Walsh, "The New York Times, December 30, 2012