re: #3 Charles Johnson

A military aircraft flying across the border is a small incident. An armed military craft flying across is a noticeable incident. Apologies expected etc. Discussions to avoid a repeat etc.

Kinda like a citizen crossing into Mexico with a semi tractor truckload of ammunition. Or a trunk full of guns. Except those civilians have far and away less training than a military pilot entrusted with live loaded weapons. Oh and neither fired a shot.

Flying across in an armed craft and firing on uniformed US officers of the law is most certainly an international incident.
And indicative of how out of control things are getting in Mexico. Cartels, mass violence, corruption and apparently military pilots a bit short on navigation skills and rules of engagement.