Australia’s dingo fences, built to protect livestock from wild dogs, stretch for thousands of kilometers.
Millions of miles of fences crisscross the Earth's surface. They divide ecosystems and affect wild species in ways that often are harmful, but are virtually unstudied.
The former Trump aide and others allegedly misused funds donated to build a border wall.
Sylvain Lefevre/Getty Images
A nonprofit law expert explains the federal case against the former Trump adviser.
Global Climate Strike NYC in New York, Sept. 20, 2019.
Rainmaker Photo/MediaPunch /IPX via AP Photo
Declaring an issue is a national emergency lets presidents act quickly and with few constraints. But once they get this kind of power, it's hard to take it back – and it can produce bad policies.
The waters of Quitobaquito in southern Arizona have attracted diverse visitors for thousands of years.
Border wall construction through Organ Pipe Cactus National Monument in Arizona is encroaching on a site where people from many cultures have interacted for thousands of years.
Kingpin no longer.
AP Photo/Eduardo Verdugo, File
The conviction of Mexican drug kingpin Joaquín Guzmán Loera, who evaded justice in Mexico, is a win for US officials. But it's a pyrrhic victory in the war on drugs.
Lucia Orosco holding her daughter, Arely, in Boquillas. Much of the embroidery created here reads ‘no el muro’ (no wall).
A scholar who travels regularly to the US-Mexico border finds ecological links and a community on the other side that welcomes American visitors.
How man-made barriers can harm humanity for centuries.
A steel wall along the U.S. border near Tecate, California, cuts across Mount Cuchame, a site sacred to the Kumeyaay people.
The U.S-Mexico border runs through Native American territories. A wall would further divide these communities, separating children from schools, farmers from water and families from each other.
Donald Trump prepares to give the 2018 US State of the Union address.
Trump is not the first US president to talk about border security, but he is the only one to make it an "urgent national crisis". Here is a handy deconstruction of President Trump's rhetorical strategy.
Migrants on a ship intercepted offshore near the Libyan town of Gohneima, east of the capital Tripoli, in July 2018.
Libyan Coast Guard via AP, File
After 1.3 million migrants from the Middle East and Africa came to Europe in 2015, many countries built fences or closed their ports. That has pushed migrants to take riskier routes into the EU.
An artist’s sketch of Joaquin ‘El Chapo’ Guzmán at a 2018 pretrial hearing in a Brooklyn Federal courthouse.
Elizabeth Williams via AP, File
With its tales of bloody violence, corruption, international trade and entrepreneurial innovation, Guzmán's trial offers a telenovela-style explainer on Mexican cartels and their American clients.
Families are feeling the pinch of the government shutdown.
AP Photo/Rick Bowmer
Because many Americans live paycheck to paycheck, the loss of even one can be a big financial blow for a family.
Presidents have traditionally given Oval Office addresses during only the gravest of crises.
AP Photo/Carolyn Kaster
We asked experts on ethics, constitutional law and European political history to analyze Trump's Oval Office address. Here's what they heard in his speech about 'crisis' at the US-Mexico border.
Is Donald Trump hoping to trade dreams for bricks?
From south of the border, Trump seems to be using DACA as a diplomatic weapon in his ongoing power struggle with the Mexican government. That just hurts 800,000 people and helps President Peña Nieto.
In Big Bend National Park’s Santa Elena Canyon, the Rio Grande separates the United States (left) from Mexico (right).
Instead of building a wall on the US-Mexico border, a landscape architect calls for restoring the Rio Grande and turning its course into an international park – an idea first proposed in the 1930s.
Activist art makes clear that the border dynamic is a lot more complex than Trumps's 'them/us' rhetoric.
EPA/Molly Riley/Polaris Pool
Running the US, it turns out, is nothing like running a business.
A UN helicopter flies over people waiting for food aid in South Sudan.
The western media's focus on events at home like the US elections and the UK Brexit referendum has come at the expense of reporting on the famine that's unfolding in Africa.
Hundreds of people march along a levee in South Texas to oppose a border wall.
AP Photo/Eric Gay
Trump has threatened a showdown over funding his proposed barrier between the U.S. and Mexico. Our experts offer a primer – from a history of walls to costs.
We need to imagine new types of borders in this era of fervent fence building.