Yes, they're training.
Just the other day NC Scout posted an article about a Mexican drug cartel that runs a 3-4 week training camp. Their people are taught by former military to use auto weapons, pistols, sniper rifles and rpg's. Every trainee must kill some one to pass the final exam AND they are required to EAT what they kill.
These criminals are dead serious and they have numerous cells operating in the SW US.
What are we doing to counter this?
"The time for war has not yet come, but it will come and that soon, and when it does come, my advice is to draw the sword and throw away the scabbard." Gen. T.J. Jackson, March 1861