The cabinet shakeup could signal a hardening of the government's military stand against organized crime.
From Guatemala to Panama, Central America is becoming a battleground for Mexican cartels.
Most are, say US officials. But the NRA says the Obama administration is inflating the scope of the problem and threatens to undermine the Second Amendment.
The buildup in Ciudad Juárez, an entry point for drug smuggling on the US border, is meant to stop vicious fighting between drug cartels.
Drug-trafficking deaths have skyrocketed by more than 117 percent in 2008.