The border tensions come on top of worries about the impact of Venezuela's political conflict and exchange controls on what was once a thriving trade between the two countries.
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They tend to think that what happens south of the border will eventually come north, and often it does.
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Regulators are hard pressed to say for sure what has come over the border.
They feared that large-scale resettlement would encourage even greater numbers to come across the border.
Albania has had about 405, 000 refugees come across its border from neighboring Kosovo.
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As we drew closer to the border, my expectations had come to include homes for each of us, new families, tall buildings, glass, waterfalls, bowls of bright oranges set upon clean tables.
Colonel STEVE WILLIAMS (Deputy Commander, NATO): You've got these caves and these systems that these guys can in and cache weapons systems and then find other ways to come across the border, go to these cache sites and arm up.
Some of them are people that have come in on their border crossing cards.
From the border with Ethiopia in the east come the white-eared kob, another breed of antelope.
Some 40% of Zahedan's 500, 000 people have come from across the border in Afghanistan.
Both the Senate and the House have come out with broad border security bills.
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Next would come greater cross-border commercial lending, including loans in Chinese currency.
Beyond the opponents, surprises always come up south of the border for the U.S. This day it was a field with grass as long as the first cut on a golf course, which made hitting crisp passes across the ground difficult.
"The first two lines I wrote for this script were 'Mona's wedding day was the saddest day of her life' and 'She knew that once she crosses the border she will never be able to come back to her family in the Golan Heights, '" director Riklis recalls.
Mr Berlusconi put pressure on both the EU and French Prime Minister Nicolas Sarkozy to help deal with Italy's migrants, but Mr Sarkozy responded by temporarily closing France's border with Italy to Tunisians who wanted to come in.
But the analysis does measures some impacts of the bill, which aims to secure the border, create new avenues for workers to come legally to the U.S., ensure employers don't hire workers here without legal status, and give a path to citizenship to the millions already here illegally.
The atrocious roads and the poor security mean that Virunga remains something of an acquired taste - most tourists are either adventurous backpackers tempted briefly over the border from Rwanda, or the very wealthy who come in by helicopter or private plane.
Murdo Fraser, one of the three candidates and currently the party's deputy leader in Scotland, thinks the Conservative brand is so toxic north of the border that the Scottish party should abolish itself and come back in another guise, only loosely allied to Mr Cameron's outfit.
They argue that any border-security measures included in the bill will never come to pass.
Yet we also need to acknowledge that we will never fully secure our border until we create a lawful way for foreign workers to come here and support our economy.
"A lot of Americans come down to Mexico and check their brains at the border, " says Duane Christie, an owner of the Century 21 master franchise in Mexico.
The talks come amid ongoing warfare and tension along the Afghan-Pakistan border.
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The proposed legislation will likely put illegal immigrants on a 13-year path to citizenship and would install new criteria for border security, allow more high- and low-skilled workers to come to the U.S. and hold businesses to tougher standards on verifying their workers are in the country legally.
"If Egypt closes the border, we will find another way in, even if we have to come in by sea, " said Yousif, a Gaza resident.
MEPs urged the European Commission to come up with a proposal by the end of 2012 on simplifying cross-border taxation.
"About 80% of the goods, in my estimate, that come under the trade agreement are smuggled back through Pakistan's large porous border, " he said.
He said the government adamantly believes the tougher restrictions would be a violation of NAFTA. On the other hand, many Mexican trucking associations say lesser restrictions would increase competition within its border because U.S. truckers, under a reciprocal agreement, would be allowed to come more freely into Mexico.
With the price hike not due to come in until next year, the debate seems likely to continue on both sides of the border.
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His first job should be to calm tensions on the Thai-Cambodian border, where Mr Thaksin's friendship with Cambodia's prime minister, Hun Sen, could come in handy.
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