Analysis of information sources in references of the Wikipedia article "Open border" in English language version.
The US-Mexico border is the busiest in the world, with approximately 350 million crossings per year.
In 2001, over 300 million two-way border crossings took place at the 43 POEs.
Over 80% of the former Soviet republic's borders have been closed for more than 30 years, stunting its economic development.
The US-Mexico border is the busiest in the world, with approximately 350 million crossings per year.
Over 80% of the former Soviet republic's borders have been closed for more than 30 years, stunting its economic development.