http://12160.info/forum/topics/mexican-military-chopper-crosses-border-what-happened-next-will
Considering how the border guards treat those who live here, I'd say 'lethal force' may be more a cause for celebration than getting infuriated; if indeed the force is 'lethal', though not quite lethal and permanently disabling is better, considering there is no death.
They obviously have done better:
https://www.google.com/search?q=drug+cartels+skinning+people+alive+pics&tbm=isch&tbo=u&source=univ&sa=X&ei=gTizU6vKM4-FogTS1oC4Ag&ved=0CB4QsAQ&biw=969&bih=500
