In Brief

How would Trump's Mexican wall work?

With the US President threatening to 'do what it takes' to build a wall, The Week looks abroad for inspiration

Donald Trump doubled down on his Mexico wall rhetoric last night, threatening to "close government" if lawmakers failed to approve funds to build a walled border across the southern US.

During a wide-ranging, 80-minute speech in Phoenix, the US President told supporters that opposition Democrats were being "obstructionist" over what he likes to call his "big, beautiful wall" with Mexico.

The House of Representatives has passed a spending bill with funding for the costly project, but it faces an "uncertain future" in the Senate, the Daily Telegraph reports.

With a budget battle looming, Trump said he would be willing to do whatever it takes to secure funding. "If we have to close down our government, we're building that wall," he said. "We're going to have our wall. The American people voted for immigration control. We're going to get that wall."

The fight is "likely to explode in September as the administration wrangles over a new budget, an increase in the debt ceiling, the beginning of a tax reform package and a possible resuscitation of health care legislation," says Politico.

"There's a reason why not one member of Congress hailing from a border state, Republican or Democrat, supports a physical barrier," says The Hill.

Keeping out the neighbours

Building an effective wall along a country's border has been a popular proposition in the 20th and 21st centuries. Since the fall of the Berlin Wall, more than 40 countries around the world have built barriers. 

"The majority have cited security concerns and the prevention of illegal migration as justifications," says The Economist.

Here are some of the examples Trump may be looking to follow: 

Spain and Morocco
Would-be immigrants sit atop a border fence after attempting to cross from Morocco to the Spanish enclave of Melilla on February 10, 2015. More than 600 immigrants tried today to climb over t

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Contrary to popular belief, the whole of Spain doesn't fit neatly into the Iberian Peninsula. The towns of Ceuta and Melilla form the only two land borders between the European Union and an African country. 

Spain's control of these two cities dates back hundreds of years but it wasn't until 1995 that the country built the first modern fence — with funding from the EU – with the specific goal of keeping immigrants out. In September 2005, its height was doubled to nearly 20ft after thousands of sub-Saharan African immigrants tried to climb over the fences in several waves. Roughly 700 made it past the fences, while six died in clashes with Moroccan security forces.

South Korea and North Korea

Perhaps the most famous border wall of them all is the Demilitarised Zone between North Korea and South Korea. It has stood for more than 60 years – the peninsula was split in two following the end of the Korean War in 1953. 

The DMZ is, of course, not really a border at all considering the two nations are still, technically, at war but the area is filled with fences and concrete barriers, mines and tunnels, as well as large numbers of nervous troops. 

The line is so precarious that "South Korean soldiers still hold hands when opening rarely used conference rooms in the joint security area of the Korean Demilitarized Zone (DMZ) as a precaution against being pulled over the border by North Korean soldiers," says Vice News.

Cyprus
NICOSIA, CYPRUS:A Greek-Cypriot soldier mans his post along the "green line" separating the Turkish occupied from the Greek controlled area of Cyprus, in Nicosia on 17 February 2004. Talks be

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2004 AFP

One of Europe's lesser-known border walls, the UN Buffer Zone in Cyprus was built in 1974 following a Cyprus National Guard coup that led to Turkish military intervention and escalated the civil war between the Greek and Turkish communities on the island. The dividing line, which cuts straight through the capital Nicosia and across the rest of the island, ranges from 11 feet at its narrowest to 4.6 miles at its widest.

The EU and UN recognise the island's south side, while only Turkey can trade with the north. "This division, and by relation the wall, has played a role in keeping Turkey out of the European Union," says journalist Nickolaus Hines.

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