id="article-body" class="row" section="article-body"> It had all the makings of an old-fashioned Texas standoff.
Hundreds of state troopers and US Border Patrol agents sat behind the wheels of black SUVs and green-and-white pickups facing the Rio Grande, their eyes fixed on the jade-colored water. A helicopter buzzed low overhead, winding along the bends of the river, while agents in a swamp boat cruised below. Four men, wearing army green uniforms and cowboy hats, rode horses up the shore, guns at the ready.