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San Isidro border post
The busiest border post on the planet - San Isidro, which is located on the border of the US and Mexico. Every day, across the border to the city moved about 50,000 cars and 25,000 people on foot - and this is only in the United States. On the photo below you can compare the modern 30-lane highway and its the same, but in 1925. But the most impressive recent photo - that it shows a clear contrast border between Mexico and the US.
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