On the sidewalk where I stood in Nogales, Arizona, a storefront window displayed mannequin brides, dressed in white wedding dresses. Not 50 feet away, the coils of glinting wire expand like a lethal slinky.

It was morning, and the town of 20,000 was just beginning to wake up. Downtown in the shopping district, a garbage truck rumbled past, and Norteño music played from stereos outside of just-opening shops. Shuttle drivers congregated along the sidewalk, waiting for Tucson or Phoenix-bound passengers to fill their vans.

In November 2018, the Trump administration ordered that the wall at the Nogales port of entry be topped with concertina razor wire. Last week, more rows of wire were suddenly added to the Arizona side of the wall, and stretched much further than the immediate port of entry. And this time, the wire was placed all the way to ground level.

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Concertina razor wire is a form of coiled barbed wire, first used in World War I. It gets its name from a musical instrument which much like an accordion has bellows that expand to produce its sound. It would be a pretty name, if it were not so dehumanizing and brutal an object.

Nogales residents alerted Mayor Arturo Garino, who said he was not told that more wire would be added. “Let me tell you,” he told Arizona Public Media, “They didn’t even have the courtesy to tell us they were doing this in the first place.” He requested to meet with federal officials to discuss the issue but was refused.

A unanimous vote by the Nogales City Council on Feb. 6 resulted in an official resolution demanding that the wire be removed from city limits.

“Concertina wire has sharp razor-like blades that are coiled [and] is designed to entangle its victim as the razors slice/cut deeply into the flesh and causes indiscriminate injury which can be fatal,” reads the resolution. “Placing coiled concertina wire that is designed to inflict serious bodily injury or death in the immediate proximity of our residents, children, pets, law enforcement and first responders is not only irresponsible but inhuman.”

Indeed, we could follow barbed wire backward in time and find it present during our worst moments as a nation. First patented in 1874 by Joseph Glidden, it was used by land grabbing homesteaders to corral their animals and section off land parcels across the indigenous-occupied West. Thus, Native Americans referred to barbed wire as “devil’s rope.”

Barbed and concertina razor wire have been used to ensnare unsuspecting men on battlefields in faraway places, to imprison Japanese-American families in World War II-era internment camps, to secure modern-day prisons which disproportionately incarcerate people of color. And surely, we have all seen photographs of emaciated children penned into Nazi concentration camps by such wire?

Now, it’s being used to further cut a city in two. For many residents, who have long called their city Ambos (“Both”) Nogales, the border between the U.S. and Mexico is a forced line separating what has historically been a single bi-national community. While in 1918 — after a misunderstanding resulted in a fatal cross-border gunfight — the two countries constructed a mutually agreed-upon fence, the barrier was porous and meant as a friendly method of keeping order. Residents were easily able to cross the border to visit family members or to shop, supporting the economy of both cities.

Fast-forward to the 1990s, when the Clinton administration adopted a border security policy called Operation Gatekeeper, which severely increased Border Patrol presence and turned the friendly line into a fortified wall, made from steel landing strips left over from the Vietnam War. Crossing the border became complicated, and in some cases, impossible. Some families were split up, no longer able to visit with one another.

So began the ritual of visits to the wall, to hold hands and talk between the slats. “Especially on weekends, it’s not uncommon to see people camped out in plastic chairs on the U.S. side, while loved ones in Mexico set up tables and lay out a family meal on the other,” wrote Arielle Ziontes in a 2017 article for the Nogales International.

But Ziontes described the installation of metal sheets of mesh along International Street at a popular meeting place, which reduced visibility and prevented families from being able to touch or hold hands.

Now with the addition of the concertina wire along the Nogales wall, any other meeting places have effectively been sabotaged.

As I stood on International Street, staring through the mesh where family members used to hold hands, I noticed a Border Patrol agent parked in the shade of the wall. He rolled down his window as I approached. I asked him about the wire — when it went up, who installed it, if it will be placed at ground level for the entirety of the wall. He shrugged. He didn’t know anything about infrastructure, he said; that’s not part of his job.

“Is it the National Guard’s?” I asked.

“I don’t know,” he said, and he rolled up the window.

If the Trump administration refuses to tear down the wire, Mayor Garino said he’s prepared to go to court. And it’s not just here in Nogales that officials are pushing back against federal directives to militarize the border. Just before President Donald Trump’s State of the Union speech, New Mexico’s Democratic Gov. Michelle Lujan Grisham ordered most of the National Guard troops stationed along the New Mexico border to withdraw from their posts, citing a “charade of border fear-mongering.”

In a speech on Feb. 12, California Democratic Gov. Gavin Newsom announced that he was withdrawing the 360 National Guard troops stationed at the Mexico-California border. “This border emergency is a manufactured crisis,” he said. “California will not be part of this political theater.”

After deploying additional troops to the southern border in November 2018, Trump spoke at a rally in Bozeman, Montana. “The Democrats want to invite caravan after caravan of illegal aliens to flood into your communities,” he told the crowd. And then he seemed to reassure them, saying, “We have our military on the border. And I noticed all that beautiful barbed wire going up today. Barbed wire used properly can be a beautiful sight.”

But from where I stood in Nogales, the wire was anything but beautiful. The metal coils caught the blinding glare of the sun, and the mid-morning light through the wall made shadows on the ground that looked like jail bars. Just yards away in Mexico, on the other side of the wire, children filed out into a schoolyard. I could see them dribbling a basketball, jumping rope. Their sing-song voices traveled over and through the wall.

But ask anyone living along the U.S.-Mexico line, and they’ll tell you: We already have fences and walls, drones and helicopters, surveillance towers, checkpoints, and border patrol agents speeding their ATVs across the fragile biotic crust of the desert.

In fact, communities are suffering due to decades of militarization and border infrastructure. Today’s walls and fences already cover 700 miles of the 2,000-mile U.S.-Mexico border, dividing towns and families, and causing damage to the environment and border communities, many of which are low-income, tribal, or on the Mexican side of the line.

In short, we don’t need or want another wall.

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In 1994, landing strips from the Vietnam War-era were welded together into a wall that separated Nogales, Arizona from its sister city of Nogales, Sonora, Mexico. Raised like a crude, rusty flag, the wall was part of Operation Gatekeeper, implemented by the Clinton administration alongside a new border strategy called “prevention through deterrence.” The policy set out to deter border crossers by militarizing urban areas along the border.

But the sudden increase in walls, cameras, and border patrol agents did nothing to curb border crossers, and instead pushed them further into the inhospitable desert. Two decades later, the desert has become a graveyard, with more than 7,000 bodies found and thousands of additional border crossers missing.

In October 2006, President George W. Bush signed into law the Secure Fence Act, which approved the building of additional border fencing. A year earlier, the REAL ID Act of 2005 included a provision that gives the secretary of homeland security power to waive any law deemed at odds with the “expeditious construction of physical barriers and roads” along the U.S. border.

“The result [of the REAL ID Act] been that along a quarter of the 2000-mile border, we have a total of four dozen laws that are off the books,” says Dan Millis, the borderlands program manager of the Sierra Club’s Grand Canyon chapter. A total of 48 federal laws have been waived, including the Clear Air Act, Clean Water Act, Migratory Bird Treaty, Endangered Species Act, and the Native American Graves Protection and Repatriation Act.

“That means that if you live in a border community where these laws have been waived, and the border patrol wants to set up a giant gravel pit to build Donald Trump’s wall, they have the ability to do that, and not comply with any of the laws that other gravel pits have to,” says Millis. “They could dump toxic sludge into your drinking water and there’s nothing you could do about it, because these laws don’t apply. The body of laws that have been built up over decades to try to protect human rights and the environment have been thrown in the trash can.”

Walls in general cause structural and geological issues, including flood, erosion, and sedimentation, and the poorly-designed, ill-conceived border infrastructure has indeed malfunctioned in serious ways. For instance, in July 2008,  a 5.2-mile section of border fence along southern Arizona’s Organ Pipe Cactus National Monument helped cause a devastating flood.

During a storm that dumped 1-2 inches of rain in 90 minutes, the 15-foot-tall wire mesh fence became a towering net for piled-up debris. The built-in drains in the fence were blocked, preventing water from escaping. And the fence’s foundation, buried six feet below the ground, prevented subsurface draining.

The result was surging water up to 7 feet high that funneled directly through the town of Lukeville, Arizona and the neighboring Mexican town of Sonoyta. The floodwaters caused severe damage to buildings, infrastructure, and natural resources.

Two hundred miles east during the same storm, a 5-foot-high concrete wall built across a storm drain by the U.S. Border Patrol caused severe flooding in sister city Nogales, Sonora. This resulted in $8 million in damage, including damage to 578 homes, and the drownings of two people. Mexican officials declared the flood area a disaster zone.

In response to the flooding, Robin Silver, co-founder of the Center for Biological Diversity, told the Arizona Daily Star, “What we are seeing graphically at Organ Pipe was predictable. … When you build an impediment across a stream, it becomes a dam. And providing some holes in a fence is a joke.”

Not only are such walls structurally and logistically unsound, but some designs would violate a 48-year-old treaty between the U.S. and Mexico regarding the construction of border structures that may affect the flow of the Rio Grande or its floodwaters. The 1970 treaty mandates pre-building approval of both the U.S. and Mexican members of the International Boundary and Water Commission. In 2017, as Trump increased his rhetoric around building a wall, the IBWC’s chief Mexican engineer, Antonio Rascón, told NPR that he would block any proposal that violated the binational treaty. “A concrete wall that blocks trans-border water movement is a total obstruction. If they plan that type of project, we will oppose it,” he said.

But blocking the flow of water is not the only damage the wall causes. The most biologically diverse desert in the United States, the Sonoran Desert spans 120,000 square miles of Arizona, California, and northern Mexico. It is home to thousands of plant and animal species uniquely adapted to the arid climate. Border militarization threatens the habitats, food and water supplies, breeding and migration patterns of these species.

A 2017 report by the Center for Biological Diversity found that “93 threatened, endangered and candidate species would potentially be affected by construction of a wall and related infrastructure spanning the entirety of the border, including jaguars, Mexican gray wolves and Quino checkerspot butterflies.”

“A wall will block movement of many wildlife species, precluding genetic exchange, population rescue and movement of species in response to climate change,” reads the report. “This may very well lead to the extinction of the jaguar, ocelot, cactus ferruginous pygmy owl and other species in the United States.”

The wall also cleaves in half the Tohono O’odham Nation, which has members on both sides of the U.S-Mexico border. The tribe maintains that any barrier is at odds with the Tohono O’odham way of life. “We’ve inhabited this land for so long, since the beginning of time,” says April Ignacio, a member of the Tohono O’odham tribe and an organizer with Indivisible Tohono. “And so not allowing that migration to flow disrupts people’s systems. We know the impacts [the border wall] has already had on our environment.”

As recently as the 1990s, the Tohono O’odham were able to move freely across the border, but Ignacio says all of that changed with Operation Gatekeeper. Tribal members were restricted to certain crossing points and had to carry a tribal ID. As the border wall was erected, the tribe saw increased migrant traffic on tribal lands and observed that certain animals were now unable to migrate. As militarization increased in the form of helicopters, checkpoints, and roving border patrol agents, traditional O’odham practices were greatly affected.

For instance, Ignacio says tribal members are stopped by border patrol while out gathering saguaro fruit or collecting basket-making materials. “One of my cousins was out hunting and had a gun pulled on him,” says Ignacio. “There are areas where men will not hunt because of how border patrol are stationed, or where they’ve patrolled and chased out the game. That directly impacts ceremony.”

Encounters with the border patrol are so disruptive, says Ignacio, that tribal members sometimes discontinue their traditions to avoid them. “They stop collecting. They stop going out.” Or, she says, they become “overly prepared,” carrying tribal ID cards and documents wherever they go and training their children to stay safe during border patrol interactions. She describes “psychological trauma that no one’s talking about, a level of trauma our children are experiencing when they go through checkpoints to state their citizenship… They will probably not remember what it was like on O’odham land without the border patrol.”

Just before Christmas last month, Trump said of the wall on Twitter, “The fact is there is nothing else’s [sic] that will work, and that has been true for thousands of years. It’s like the wheel, there is nothing better. I know tech better than anyone, & technology … on a Border is only effective in conjunction with a Wall.”

Trump does not know the borderlands. He does not know the smell of fry bread, or the way a cholla forest glows in the golden hours just before sunset, or the ferocity of a wash after a summer monsoon. He does not know the pain of a community sliced in half, the bodies in the desert, or the desperation of border crossers fleeing violence and economic destitution. This beautiful, rugged place has already been hijacked and turned into a weapon.

President Trump, we don’t want your wall.