International waters are 50 miles out. They're under Iranian jurisdiction and attempting to spy on them. The US were the first to declare war by going into their airspace...
you're wrong 12 miles is the lands jurisdiction The drone crashed 20 miles out. The straight of Hormuz is only 24 miles wide..
If the drone had it's transponder on, the track is easily available. If it had the transponder off, it was up to no good and a threat which should not be tolerated.
The nation who was flying a drone without a transponder should be assumed to be in the wrong unless it is proven otherwise by independent third parties.
Interestingly, Iran is taking full credit even when Trump made a feeble attempt to downplay it. Looks like Iran is sending out a message that they may have some capabilities which are not understood fully by their adversaries. From what I hear, the U.S. has been keeping most of their ships safely OUT of the Persian Gulf as though they have a suspicion that they may be lost.