Security at the Texas-Mexico border has grown exponentially after an influx of undocumented, and often unaccompanied, migrant children in recent months. In response to the surge, Texas Governor Rick Perry has deployed up to one thousand National Guard troops. In addition, there's been a surge in federal Border Patrol agents and Department of Public Safety troopers.
Suffice to say, there are a lot of boots on the ground along the Rio Grande. But what exactly is the role and responsibility of every local, state and federal agency in securing the border?