from Threats Watch
To give you an idea of just how serious the situation is, and to put this into perspective, consider the numbers presented in the Washington Post article to those in the Afghanistan war.
Mexico: 6,000+ killed in 2008 narco war
Afghanistan: 8,600 killed in 2008 (UN figure)
Mexico: 45,000 Mexican troops deployed
Afghanistan: 38,000 US troops deployed
That should get your attention.
Mexico is a serious problem, transitioning from an immigration problem to a significant physical security threat - one which will only exacerbate the immigration crisis, which contributes to the economic crisis, which impacts budgets, which impacts (always first before all other governmental departments) defense and security. You see where this is going.