4/22/16 New York Times
BIG BEND NATIONAL PARK, Tex. — There are places in the desert canyons of far West Texas where the border between the United States and Mexico amounts to an olive-green ribbon of water, so shallow that canoes scrape to a halt on the rocks. Here the Rio Grande — the border that has separated the two countries since 1848, with the signing of the Treaty of Guadalupe Hidalgo — narrows to a pinch. At times it is as wide as a school bus is long. At other times it is not even that wide. An owl can make the crossing with one or two flaps of its wings.
In these remote places in Big Bend National Park, the Rio Grande seems void of any power to divide. There are no boundary lines, no signs, no walls, no border agents on either side. To journey here to the vast, empty canyons of West Texas is to watch the border itself all but vanish as a physical and political space, an extraordinary feat in these times when the notion of the border often seems more a political construct than a geographic one.
Consider Los Diablos and the cane burns of the Rio Grande that played out this month. Los Diablos are a team of Mexican firefighters who are part of a group of Mexicans and Americans including firefighters, conservationists and park rangers. They travel along the most desolate stretches of the river not to put out fires, but to set them in a controlled burn meticulously planned to kill giant cane, a tall bamboo-style invasive grass that grows in dense patches on both sides of the river. The cane chokes and helps narrow the flow of the Rio Grande, which contributes to the frequency of flooding and to the burying of habitats for native plants and fish.